TWS API Precautions: what bypass settings mean

Quick answer

API → Precautions lets you skip some order warnings. Read the full warning first. Find the one box that matches it and learn what the box skips. Do not turn them all on just to make an alert work. Keep the checks your workflow still needs.

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

Step by step

1 Capture the full warning or rejection and identify the affected order type.
2 Open Global Configuration → API → Precautions.
3 Read the specific bypass label and compare it with the warning you received.
4 If the workflow requires a supported bypass, document why and test the intended behavior in paper trading.
5 Review size, price, and exit controls in the app before using the setup live.

A practical example

Think of each bypass box as a separate choice. One relates to bonds, another to a price risk, and another to a route. Your stock alert does not need every box checked just because it uses the API. Match the full warning to the exact control. If you cannot explain what a box will skip, leave it alone and ask support. A working connection is not a reason to remove unrelated order checks. The screenshot shows the controls, not a list of boxes everyone should enable.

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

Screen reference

Start in Mosaic with File → Global Configuration. Then choose the panel named in the steps.

TWS API Precautions panel with individual bypass controls — Read each bypass label individually. This image shows where the controls are; it does not recommend enabling them all. Captured in TWS paper mode on 3 October 2026. Open the image for full size.

How to confirm the result The particular warning should be understood and the resulting order behavior should match the planned controls.

Mistake to avoid

Checking every box is not a general connection fix. A bypass can remove a useful intervention.

Common questions

Will a bypass fix missing trading permission?

No. Broker permissions are separate.

Is this the same as Read-Only API?

No. Read-only controls order request broadly; these settings concern particular precautions.

Find Global Configuration in Mosaic and Classic TWS How to check TWS memory allocation TWS is slow or freezing: a practical diagnosis TWS error 201: read the order rejection reason

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.