What is the latest Interactive Brokers TWS API version in 2026?

TWS API 10.51 (v1051.01), released Sep 29 2026, is the latest channel and includes the Python API. The stable channel is 10.50 (v1050.02), released Sep 9 2026 (verified 2026-10-18).

What did TWS API 10.47 remove?

It removed the legacy fundamentals path: reqFundamentalData, reqFundamentalsDataProtoBuf, cancelFundamentalData, cancelFundamentalsDataProtoBuf, their callbacks, and the FUNDAMENTAL_RATIOS = 47 tick type. Code calling these stops returning data on a 10.47-or-later client, which now includes both the stable and latest channels.

What is the $LEDGER- prefix in TWS API 10.47?

A new API setting that prepends $LEDGER- to per-currency account-value keys (e.g. $LEDGER-CashBalance) so they are distinct from account-level keys. It is off by default for upgrading users and on for new users, and it affects reqAccountUpdates and reqAccountUpdatesMulti.

Is the TWS API open source?

Yes, from 10.49. Interactive Brokers released the TWS API as open source under the GNU General Public License, and the download page now links to a contribution path. Check the licence terms if you distribute software that embeds the API client.

Did the IBKR API rate limits change in the 2026 updates?

No. The request ceiling of market-data lines divided by 2 per second (50 on the default 100 lines) and the historical-data pacing rules (60 per 10 minutes, 6 per 2 seconds for the same contract, no identical request within 15 seconds, BID_ASK counted double, 50 simultaneous open requests) carry over unchanged (verified 2026-10-18).

Interactive Brokers API Updates 2026: TWS API 10.43 to 10.51

Education, not investment advice. Past performance does not predict future results. How we check our numbers.

Interactive Brokers' 2026 TWS API release notes run from 10.43 to 10.51, and two of those releases change how an existing bot behaves. 10.47 removes reqFundamentalData (plus its protobuf siblings, callbacks, and the FUNDAMENTAL_RATIOS = 47 tick type) and adds a setting that prepends a $LEDGER- prefix to per-currency account values, changing the keys returned by reqAccountUpdates and reqAccountUpdatesMulti. 10.49 released the TWS API as open source under the GNU General Public License. As of 2026-10-18 the download page lists 10.50 as stable (Sep 9 2026) and 10.51 as latest (Sep 29 2026), with the Python API still on the latest channel only¹². If your bot reads fundamentals or parses per-currency balances, read this before you upgrade. Compare IBKR against other brokers in the Broker API Comparator.

TL;DR

Stable: TWS API 10.50 (v1050.02), released Sep 9 2026¹.
Latest: TWS API 10.51 (v1051.01), released Sep 29 2026; the latest channel adds the Python API to the stable languages¹.
10.47 removed fundamentals: reqFundamentalData, reqFundamentalsDataProtoBuf, cancelFundamentalData, cancelFundamentalsDataProtoBuf, their callbacks, and tick type FUNDAMENTAL_RATIOS = 47².
10.47 $LEDGER- prefix: a new API setting prepends $LEDGER- to per-currency keys (e.g. $LEDGER-CashBalance); off by default for upgrading users, on for new users; affects reqAccountUpdates / reqAccountUpdatesMulti²³.
10.49 went open source under the GPL and added a Settlement Type field to contract details².
10.48 to 10.51: reqOpenOrders now includes de-activated orders (10.48), orders gain conditionsIncludeOvernight (10.50), and reqPositions reports the right exchange for commodities and CFDs (10.51)².
Rate limits unchanged: market-data lines divided by 2 requests per second (50 on the default 100 lines) and the historical-data pacing rules still hold⁴.

Version state in October 2026

IBKR runs two parallel channels on the TWS API download page¹:

Channel	Version	Release date	API languages
Stable	10.50 (v1050.02)	Sep 9 2026	Java, C++, C#/.NET, ActiveX, DDE on Windows; Java and POSIX C++ on Mac/Linux
Latest	10.51 (v1051.01)	Sep 29 2026	Above plus Python

Verified 2026-10-18¹. Both channels are now past 10.47, so its breaking changes reach every client on its next upgrade, whichever channel it follows. IBKR recommends TWS or IB Gateway 1050.02 or higher for full feature support¹.

2026 release by release

Version	What changed	Effect on an existing bot
10.43	Stage orders from the API and submit them from the IBKR mobile app; get-config request/response	Additive
10.44	Update-config request/response; fractional last sizes in `tickSize`	Additive, but size handlers must accept fractions
10.45	`hedgeMaxSize` order parameter; one-time clearing of "Enable ActiveX and Socket Clients" and "Allow connections from localhost only"	API connections fail until the settings are re-enabled
10.46	Odd-lot tick types 105–110 and generic tick 787	Additive
10.47	Fundamentals methods removed; `$LEDGER-` prefix setting	Breaking
10.48	`reqOpenOrders` includes de-activated orders	Behaviour change
10.49	Open source under the GPL; Settlement Type in contract details	Additive
10.50	`conditionsIncludeOvernight` on orders; protobuf field descriptions; Excel DDE and portfolio fixes	Additive
10.51	`reqPositions` exchange field fixed for commodities and CFDs	Fix

All entries are from IBKR's 2026 production release notes².

The removed fundamentals API

The clearest break in 10.47 is the deletion of the legacy fundamentals path. Removed methods: reqFundamentalData, reqFundamentalsDataProtoBuf, cancelFundamentalData, and cancelFundamentalsDataProtoBuf, along with the matching callbacks and the FUNDAMENTAL_RATIOS = 47 tick type². Code calling any of these against a 10.47-or-later client stops returning data. This was a financial-statement and ratio feed (Reuters-sourced), separate from corporate-event data. IBKR's current path for corporate events is the Wall Street Horizon methods reqWshMetaData and reqWshEventData, which cover earnings dates, dividends, splits, and conferences and need the Wall Street Horizon research subscription activated first⁵. A bot that depended on reqFundamentalData for ratios needs an external fundamentals source after upgrading.

The `$LEDGER-` per-currency prefix

The second behavior change is opt-in but easy to trip over. 10.47 adds an API setting, "Prepend '$LEDGER-' prefix to per-currency account values"²³. It fixes a long-standing ambiguity: a key like CashBalance appeared both at the overall-account level and inside each currency ledger, with no way to tell them apart. With the setting on, per-currency keys become $LEDGER-CashBalance and so on, while account-level keys stay bare²³. The default is what bites you: off for upgrading users, on for new users²³. Two installs of the same bot can therefore parse different account-value keys depending on install age. Affected calls are reqAccountUpdates and reqAccountUpdatesMulti².

De-activated orders in `reqOpenOrders` (10.48)

From 10.48 the reqOpenOrders response includes de-activated orders². A reconciliation loop that treats every returned order as live can now count orders that will not fill, or try to cancel orders that are already inactive. Filter the response on order status rather than assuming every entry is working.

Open source from 10.49

10.49 released the TWS API under the GNU General Public License, and the download page now carries a Contribute link alongside the installers¹². For most bots nothing changes at runtime. The licence matters if you distribute software that embeds the API client, so read the GPL's terms before you ship a closed-source product built on it.

Rate limits in 2026: no change

A frequent question around any API bump is whether the pacing rules moved. For TWS API in 2026 they did not. The request ceiling is still your market-data lines divided by 2 per second: 50 requests per second on the default 100 lines, 100 on 200 lines⁴. Historical-data pacing is also unchanged: for bars of 30 seconds or less, at most 60 requests in any ten-minute window, no 6+ requests for the same contract, exchange and tick type within 2 seconds, and no identical request repeated within 15 seconds; BID_ASK counts double, and at most 50 historical requests can be open at once⁴. For the full pacing playbook see IBKR TWS API Rate Limits 2026; for the cost side see Interactive Brokers API Pricing 2026.

Upgrade checklist

Re-enable socket clients after any upgrade that passes through 10.45, which clears "Enable ActiveX and Socket Clients" and "Allow connections from localhost only" once².
Audit for reqFundamentalData and its cancel/protobuf variants and the FUNDAMENTAL_RATIOS tick; route those to an external fundamentals feed before moving past 10.46².
Pin the $LEDGER- setting explicitly in your build runbook so every install parses the same keys, rather than relying on the upgrade-vs-new default²³.
Filter reqOpenOrders by status once you are on 10.48 or later².
Re-test account-value parsing against both prefixed and bare keys.
No throttle changes to re-tune — the lines-divided-by-2 request ceiling and historical pacing rules carry over from the prior line⁴.

Verified figures

The 10.50 stable (Sep 9 2026) and 10.51 latest (Sep 29 2026) versions, the Python-on-latest channel split, the 10.43 to 10.51 release-note entries (including the 10.47 fundamentals removal, the $LEDGER- prefix setting and its upgrade-vs-new default, and the 10.49 open-source release), and the unchanged request and historical pacing limits were all verified against IBKR's own pages on 2026-10-18. Prices and per-exchange data subscriptions are not restated here; see the pricing article.

Connects to

IBKR TWS API Rate Limits 2026: the full pacing rules these updates leave intact.
Interactive Brokers API Pricing 2026: the cost side of the same API.
Alpaca vs Interactive Brokers API 2026: pacing model versus a flat per-minute cap.
Broker API Comparator: IBKR's surface against other brokers.

References

Interactive Brokers. "TWS API" download page (Stable: 10.50, v1050.02, Release Date Sep 9 2026; Latest: 10.51, v1051.01, Release Date Sep 29 2026; Python included on the latest channel; recommended TWS or IB Gateway 1050.02 or higher). interactivebrokers.github.io, verified 2026-10-18. https://download2.interactivebrokers.com/installers/tws-api/index.html ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷
Interactive Brokers. "Trader Workstation (TWS) 2026 API Production Release Notes" (10.43 mobile order staging and get-config; 10.44 update-config and fractional last sizes; 10.45 hedgeMaxSize and one-time socket-setting reset; 10.46 odd-lot ticks 105–110 and generic tick 787; 10.47 removes reqFundamentalData/reqFundamentalsDataProtoBuf/cancelFundamentalData/cancelFundamentalsDataProtoBuf and the related callbacks and tick type, and adds the "$LEDGER-" per-currency prefix setting, disabled by default for upgrading users and enabled for new users; 10.48 reqOpenOrders includes de-activated orders; 10.49 open source under the GPL and Settlement Type; 10.50 conditionsIncludeOvernight; 10.51 reqPositions exchange-field fix). ibkrguides.com, verified 2026-10-18. https://www.ibkrguides.com/releasenotes/prod-2026.htm ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷
FX News Group. "Interactive Brokers updates TWS API" (10.47: new "Prepend '$LEDGER-' prefix to per-currency account values" setting; keys become e.g. "$LEDGER-CashBalance"; disabled by default for existing users, enabled for new ones). fxnewsgroup.com, verified 2026-10-18. https://fxnewsgroup.com/forex-news/retail-forex/interactive-brokers-updates-tws-api-2/ ↩ ↩² ↩³ ↩⁴ ↩⁵
Interactive Brokers. "TWS API: Pacing Limitations, Introduction" (maximum requests per second = market-data lines / 2; 50 on the default 100 lines) and "TWS API - Historical Data Limitations" (60 requests in any ten-minute period, six or more same-contract requests within two seconds, identical request within 15 seconds, BID_ASK counted twice, 50 maximum simultaneous open requests). interactivebrokers.com and interactivebrokers.github.io, verified 2026-10-18. https://www.interactivebrokers.com/docs/tws-api/doc/pacing-limitations/introduction ↩ ↩² ↩³ ↩⁴
Interactive Brokers. "TWS API - Fundamental Data" (corporate events via reqWshMetaData and reqWshEventData; requires the Wall Street Horizon research subscription). interactivebrokers.github.io, verified 2026-10-18. https://interactivebrokers.github.io/tws-api/fundamentals.html ↩

Verified engine output

Show the recompute-verified inputs and outputs

Multi-asset brokers including futures coverage

Inputs
require_futures	1
max_auth_complexity	5

Result
filters › require options	false
filters › require futures	true
filters › require crypto	false
filters › require mcp	false
filters › require free tier	false
filters › max auth complexity	5
results › row 1 › broker › id	ibkr
results › row 1 › broker › name	Interactive Brokers
results › row 1 › broker › url	https://www.interactivebrokers.com/
results › row 1 › broker › docs url	https://www.interactivebrokers.com/en/trading/ib-api.php
results › row 1 › broker › auth	OAuth + TWS/IB Gateway
results › row 1 › broker › auth complexity	5
results › row 1 › broker › order types (10 items)	[...]
results › row 1 › broker › rate limits	Market-data lines / 2 requests per second (50 on the default 100 lines); small-bar history 60 requests per 10 min
results › row 1 › broker › market data › row 1	Global equities via subscription bundles
results › row 1 › broker › market data › row 2	Level-2 depth on most exchanges
results › row 1 › broker › market data › row 3	Historical depth across asset classes
results › row 1 › broker › mcp	official
results › row 1 › broker › mcp note	Official IBKR Connector: remote MCP at api.ibkr.com, IBKR sign-in, one account; drafts trade instructions that you submit as orders yourself
results › row 1 › broker › assets › stocks	true
results › row 1 › broker › assets › options	true
results › row 1 › broker › assets › futures	true
results › row 1 › broker › assets › crypto	true
results › row 1 › broker › assets › forex	true
results › row 1 › broker › assets › bonds	true
results › row 1 › broker › account minimum	0
results › row 1 › broker › commission	Tiered per-share or fixed; ~$0.0035/sh tiered
results › row 1 › broker › good for	Multi-asset-class, international, scale
results › row 1 › broker › has free tier	false
results › row 1 › broker › notes › row 1	Requires TWS or IB Gateway running locally
results › row 1 › broker › notes › row 2	Idempotency via client-supplied orderId
results › row 1 › broker › notes › row 3	Fully headless gateway is possible but under-documented
results › row 1 › score	2
results › row 1 › max score	2
results › row 1 › fits	true
results › row 2 › broker › id	alpaca
results › row 2 › broker › name	Alpaca
results › row 2 › broker › url	https://alpaca.markets/
results › row 2 › broker › docs url	https://alpaca.markets/docs/
results › row 2 › broker › auth	API Key + Secret
results › row 2 › broker › auth complexity	1
results › row 2 › broker › order types (10 items)	[...]
results › row 2 › broker › rate limits	Trading API 200 req/min; market data 200/min free, 10,000/min on Algo Trader Plus
results › row 2 › broker › market data › row 1	IEX real-time (free)
results › row 2 › broker › market data › row 2	Full SIP on Algo Trader Plus ($99/mo)
results › row 2 › broker › market data › row 3	Historical bars + trades + quotes
results › row 2 › broker › mcp	official
results › row 2 › broker › mcp note	Official open-source MCP server (V2 rewrite on FastMCP/OpenAPI); data, paper and live trading
results › row 2 › broker › assets › stocks	true
results › row 2 › broker › assets › options	true
results › row 2 › broker › assets › futures	false
results › row 2 › broker › assets › crypto	true
results › row 2 › broker › assets › forex	false
results › row 2 › broker › assets › bonds	false
results › row 2 › broker › account minimum	0
results › row 2 › broker › commission	$0 (PFOF on equities)
results › row 2 › broker › good for	Solo AI operator, paper-to-live parity
results › row 2 › broker › has free tier	true
results › row 2 › broker › notes › row 1	Free paper trading with same API surface as live
results › row 2 › broker › notes › row 2	Real-time OPRA options data needs Algo Trader Plus; Basic gets the indicative feed
results › row 2 › broker › notes › row 3	Python/Go SDKs mature; rate-limit backoff documented
results › row 2 › score	1
results › row 2 › max score	2
results › row 2 › fits	false
results › row 2 › fail reasons › row 1	Futures
results › row 3 › broker › id	tradier
results › row 3 › broker › name	Tradier
results › row 3 › broker › url	https://tradier.com/
results › row 3 › broker › docs url	https://developer.tradier.com/
results › row 3 › broker › auth	OAuth 2.0
results › row 3 › broker › auth complexity	3
results › row 3 › broker › order types (8 items)	[...]
results › row 3 › broker › rate limits	120 req/min standard and market data, 60 req/min trading (production)
results › row 3 › broker › market data › row 1	Real-time equities + options (streaming)
results › row 3 › broker › market data › row 2	Historical OHLC back ~5 years
results › row 3 › broker › market data › row 3	No Level-2 depth
results › row 3 › broker › mcp	official
results › row 3 › broker › mcp note	Official hosted MCP server (Streamable HTTP, personal API token); market data, accounts and order placement
results › row 3 › broker › assets › stocks	true
results › row 3 › broker › assets › options	true
results › row 3 › broker › assets › futures	false
results › row 3 › broker › assets › crypto	false
results › row 3 › broker › assets › forex	false
results › row 3 › broker › assets › bonds	false
results › row 3 › broker › account minimum	0
results › row 3 › broker › commission	$0 equities (PFOF), $0.35/contract options Pro
results › row 3 › broker › good for	Options-first retail, multi-leg strategies
results › row 3 › broker › has free tier	true
results › row 3 › broker › notes › row 1	Free sandbox with delayed data
results › row 3 › broker › notes › row 2	Strong options chain + multi-leg order API
results › row 3 › broker › notes › row 3	US-only account eligibility
results › row 3 › score	1
results › row 3 › max score	2
results › row 3 › fits	false
results › row 3 › fail reasons › row 1	Futures
results › row 4 › broker › id	robinhood
results › row 4 › broker › name	Robinhood
results › row 4 › broker › url	https://robinhood.com/
results › row 4 › broker › docs url	https://docs.robinhood.com/
results › row 4 › broker › auth	API key (Crypto Trading API); Robinhood sign-in (Trading MCP)
results › row 4 › broker › auth complexity	3
results › row 4 › broker › order types › row 1	market
results › row 4 › broker › order types › row 2	limit
results › row 4 › broker › order types › row 3	stop
results › row 4 › broker › order types › row 4	stop-limit
results › row 4 › broker › rate limits	Not publicly documented
results › row 4 › broker › market data › row 1	Delayed quotes in public tier
results › row 4 › broker › market data › row 2	Limited historical depth
results › row 4 › broker › market data › row 3	No public Level-2
results › row 4 › broker › mcp	official
results › row 4 › broker › mcp note	Official Robinhood Trading MCP (Agentic Trading): long equities, options and crypto, only in a dedicated agentic account; no multi-leg options
results › row 4 › broker › assets › stocks	true
results › row 4 › broker › assets › options	true
results › row 4 › broker › assets › futures	false
results › row 4 › broker › assets › crypto	true
results › row 4 › broker › assets › forex	false
results › row 4 › broker › assets › bonds	false
results › row 4 › broker › account minimum	0
results › row 4 › broker › commission	$0 (PFOF), $5/mo Gold for margin + extras
results › row 4 › broker › good for	Agent-driven trading from an existing Robinhood account; no REST API for stocks or options
results › row 4 › broker › has free tier	true
results › row 4 › broker › notes › row 1	Official REST API covers crypto only; stocks and options are reachable only through the Trading MCP
results › row 4 › broker › notes › row 2	Trade approvals are off by default for external MCP agents
results › row 4 › broker › notes › row 3	Paper trading unavailable
results › row 4 › score	1
results › row 4 › max score	2
results › row 4 › fits	false
results › row 4 › fail reasons › row 1	Futures
results › row 5 › broker › id	schwab
results › row 5 › broker › name	Schwab
results › row 5 › broker › url	https://www.schwab.com/
results › row 5 › broker › docs url	https://developer.schwab.com/
results › row 5 › broker › auth	OAuth 2.0 (3-legged)
results › row 5 › broker › auth complexity	4
results › row 5 › broker › order types (9 items)	[...]
results › row 5 › broker › rate limits	120 req/min for non-order calls per app; order writes 0-120/min per account, set at app registration
results › row 5 › broker › market data › row 1	Real-time equities + options quotes
results › row 5 › broker › market data › row 2	Historical bars (1m to daily)
results › row 5 › broker › market data › row 3	No exchange depth via API
results › row 5 › broker › mcp	community
results › row 5 › broker › mcp note	No official MCP; community servers wrap the Trader API (self-hosted, re-authorize when the 7-day refresh token expires)
results › row 5 › broker › assets › stocks	true
results › row 5 › broker › assets › options	true
results › row 5 › broker › assets › futures	false
results › row 5 › broker › assets › crypto	false
results › row 5 › broker › assets › forex	false
results › row 5 › broker › assets › bonds	false
results › row 5 › broker › account minimum	0
results › row 5 › broker › commission	$0 equities, $0.65/contract options
results › row 5 › broker › good for	Established retail, post-TDA API migration
results › row 5 › broker › has free tier	true
results › row 5 › broker › notes › row 1	API rebuilt after TD Ameritrade integration; still maturing
results › row 5 › broker › notes › row 2	Orders cover stocks, ETFs and options; futures and forex trade on thinkorswim, not through the API
results › row 5 › broker › notes › row 3	Requires individual developer registration and app review
results › row 5 › broker › notes › row 4	Token refresh flow is finicky vs Alpaca/Tradier
results › row 5 › score	1
results › row 5 › max score	2
results › row 5 › fits	false
results › row 5 › fail reasons › row 1	Futures
fitting brokers › row 1 › broker › id	ibkr
fitting brokers › row 1 › broker › name	Interactive Brokers
fitting brokers › row 1 › broker › url	https://www.interactivebrokers.com/
fitting brokers › row 1 › broker › docs url	https://www.interactivebrokers.com/en/trading/ib-api.php
fitting brokers › row 1 › broker › auth	OAuth + TWS/IB Gateway
fitting brokers › row 1 › broker › auth complexity	5
fitting brokers › row 1 › broker › order types (10 items)	[...]
fitting brokers › row 1 › broker › rate limits	Market-data lines / 2 requests per second (50 on the default 100 lines); small-bar history 60 requests per 10 min
fitting brokers › row 1 › broker › market data › row 1	Global equities via subscription bundles
fitting brokers › row 1 › broker › market data › row 2	Level-2 depth on most exchanges
fitting brokers › row 1 › broker › market data › row 3	Historical depth across asset classes
fitting brokers › row 1 › broker › mcp	official
fitting brokers › row 1 › broker › mcp note	Official IBKR Connector: remote MCP at api.ibkr.com, IBKR sign-in, one account; drafts trade instructions that you submit as orders yourself
fitting brokers › row 1 › broker › assets › stocks	true
fitting brokers › row 1 › broker › assets › options	true
fitting brokers › row 1 › broker › assets › futures	true
fitting brokers › row 1 › broker › assets › crypto	true
fitting brokers › row 1 › broker › assets › forex	true
fitting brokers › row 1 › broker › assets › bonds	true
fitting brokers › row 1 › broker › account minimum	0
fitting brokers › row 1 › broker › commission	Tiered per-share or fixed; ~$0.0035/sh tiered
fitting brokers › row 1 › broker › good for	Multi-asset-class, international, scale
fitting brokers › row 1 › broker › has free tier	false
fitting brokers › row 1 › broker › notes › row 1	Requires TWS or IB Gateway running locally
fitting brokers › row 1 › broker › notes › row 2	Idempotency via client-supplied orderId
fitting brokers › row 1 › broker › notes › row 3	Fully headless gateway is possible but under-documented
fitting brokers › row 1 › score	2
fitting brokers › row 1 › max score	2
fitting brokers › row 1 › fits	true

Computed live at build time.

Frequently asked questions

What is the latest Interactive Brokers TWS API version in 2026?: TWS API 10.51 (v1051.01), released Sep 29 2026, is the latest channel and includes the Python API. The stable channel is 10.50 (v1050.02), released Sep 9 2026 (verified 2026-10-18).
What did TWS API 10.47 remove?: It removed the legacy fundamentals path: reqFundamentalData, reqFundamentalsDataProtoBuf, cancelFundamentalData, cancelFundamentalsDataProtoBuf, their callbacks, and the FUNDAMENTAL_RATIOS = 47 tick type. Code calling these stops returning data on a 10.47-or-later client, which now includes both the stable and latest channels.
What is the $LEDGER- prefix in TWS API 10.47?: A new API setting that prepends $LEDGER- to per-currency account-value keys (e.g. $LEDGER-CashBalance) so they are distinct from account-level keys. It is off by default for upgrading users and on for new users, and it affects reqAccountUpdates and reqAccountUpdatesMulti.
Is the TWS API open source?: Yes, from 10.49. Interactive Brokers released the TWS API as open source under the GNU General Public License, and the download page now links to a contribution path. Check the licence terms if you distribute software that embeds the API client.
Did the IBKR API rate limits change in the 2026 updates?: No. The request ceiling of market-data lines divided by 2 per second (50 on the default 100 lines) and the historical-data pacing rules (60 per 10 minutes, 6 per 2 seconds for the same contract, no identical request within 15 seconds, BID_ASK counted double, 50 simultaneous open requests) carry over unchanged (verified 2026-10-18).

The 17 vendor figures on this page, each with its source and the date it was checked, are also in the vendor price reference, where every figure has its own link.