Why a TWS quote does not show every trade tick

Quick answer

A watchlist shows price updates at set intervals. It may not show every trade. Check which feed your app uses: standard quotes or tick-by-tick data. The update rate can vary by product and region. A faster screen refresh will not change the feed itself.

Educational software guidance. Trading involves risk. Read the financial and information disclaimers.

Step by step

1 In Mosaic, open New Window → Time & Sales → Time & Sales for the contract. Choose the trade-price view if offered. This event list and a watchlist quote are different views.
2 Use the Time & Sales gear → Settings to check trade fields, quote rows and time zone. Check the contract and feed access too. A populated old list does not prove that a live feed is working.
3 Record a short interval with timestamps rather than judging by screen movement alone.
4 For custom software, ask the developer to confirm the requested API method and supported update behavior.
5 Choose a supported data path that matches the analysis you need.

A practical example

A screen can update several times a second without showing every trade that took place. Think of a photo taken at intervals compared with a full event list. If your task needs the event list, check that the app requests a supported tick feed. Making the screen redraw faster will not add events to a feed that did not send them in the first place.

Illustrative scenario, not a record of a trade placed during this review.

Screen reference

TWS Time and Sales window with time, last price, size, exchange and trade condition columns — This paper-session capture shows recorded trades for an example stock while the market is closed. It is not a live-feed test. Compare timestamps and data definitions before comparing it with an API feed. Captured in TWS paper mode on 3 October 2026. Open the image for full size.

TWS New Window menu with Market Depth Level II and Time and Sales — In Mosaic, New Window opens these quote tools. Choose the exact contract before comparing their data. Captured in TWS paper mode on 3 October 2026. Open the image for full size.

Time and Sales settings with quote choices, trade fields, columns and user time zone — Open the tool gear → Settings to inspect display choices. This example shows trade fields and no bid/ask quote rows. These UI controls do not change which API method a separate app requests. The settings dialog was closed with Cancel. Captured in TWS paper mode on 3 October 2026. Open the image for full size.

TWS stock Description showing SMART route, NASDAQ primary exchange, currency, contract ID, minimum tick and frozen data status — This stock is an example of the fields to compare. SMART routing and Primary Exchange are separate fields. The observed feed is Frozen and the market is closed; this is not a live-price or trading recommendation. Captured in TWS paper mode on 3 October 2026. Open the image for full size.

How to confirm the result Your expectation for update frequency should match the actual feed type.

Mistake to avoid

A fast screen refresh cannot make a snapshot-based feed include events it did not deliver.

Common questions

Is a slowly changing last price always a disconnect?

No. The market may be quiet, or the stream may update on intervals. Check timestamps and status.

Does tick-by-tick support cover every product?

Verify availability and limits for the requested product.

TWS delayed versus live data: how to tell Paper TWS has no market data: what to check Quotes work in TWS but not through the API TWS 2104, 2106 and 2158: connection OK messages

Financial and information disclaimers

Financial disclaimer

These guides explain software. They are for education, not financial, investment, tax, or legal advice. No example is a suggestion to buy or sell a product or use a trading strategy. Trading can lose money, including all funds you put at risk. With margin, futures, short sales, or some options, losses can exceed your starting funds. Automation can fail, send duplicate orders, or act late. Stops do not guarantee a fill or a price. Review your orders and positions, and seek advice from a qualified professional for your own needs. Paper trades, examples, and past results do not predict live results or promise a profit.

Information disclaimer

This is general help based on the sources and check date shown on the page. Screens, settings, fees, data access, and product support can change or differ by app version, account, country, and broker. The content may contain errors or become out of date; accuracy, completeness, and continuous service are not guaranteed. Check current broker and app instructions before acting. Screenshots show where controls are; they do not prove that an order test passed. This guide does not replace broker terms or risk notices. References to IBKR and TradingView identify their products and do not imply their endorsement of this guide.