TWS error 110: price does not match the tick size

Quick answer

Error 110 means an order price does not fit the contract’s allowed price increment, also called its tick size. Check every price field, including the stop and limit. Decimal places alone are not enough to validate a price.

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

Step by step

1 Open the product’s Description in TWS and confirm you have the correct contract.
2 Check its price-increment details or the applicable market rule. Some rules vary by price range or venue.
3 Compare the rejected limit, stop, and offset values with the allowed increments.
4 Correct the alert or app setting that created the invalid value. Choose the adjustment with care because it changes the order price.
5 Review a paper order preview or the generated request before resubmission.

A practical example

Suppose a contract permits price steps of 0.05 and an app sends 10.03. That price is not on the allowed grid. Check which field used it: the entry limit, stop, or target. Do not assume a number with two decimal places is valid. First read the rule for the actual contract, then choose the new price on purpose rather than rounding every order in the same direction.

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

Screen reference

TWS futures Description showing contract month, expiry, multiplier, exchange, tick size and trading schedule — This example future shows where to read the month, multiplier and tick size. Use your own intended contract; the pictured contract is not a recommendation. The captured market is closed and data is Frozen. 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 All price fields should fit the applicable tick rule for the selected contract.

Mistake to avoid

A stock, option, and future can have different tick rules. Do not apply a universal two-decimal rounding rule.

Common questions

Is tick size the same as tick value?

No. Tick size is a price step; tick value is its monetary effect for a contract.

Can the stop price cause 110?

Yes. Review all price fields, not only the entry limit.

TWS error 200: contract not found or ambiguous TWS error 201: read the order rejection reason TWS error 202: why was the order cancelled? TWS Messages settings and order warnings

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.