Originally Posted by: temperino

Good morning, I'm reviving this discussion because I too am full of doubts regarding the system tester/order results. Given that in the trade option settings I leave the "realistic market price" box checked but select +1 for the delay order opening, I find myself with many Canceled-Open Cost orders. The system I use is based on entries generated by candlestick patterns with OR logic. So the expert advisor and the explorer (which share the same formula) signal a buy, which is then not counted in the system tester. The question is therefore simple: how do I adjust based on the signals that the explorer or expert provides me from time to time? Some of these signals are not counted, making it difficult to trade. Do I buy or not buy? Do I sell or not sell? I can't find any correspondence in the system tester. Thanks

Hello,

With the System Test there are several factors that would create a situation where an Expert Advisor signal does not occur in the System Tester.

If you are already in a trade and you have limited simultaneous positions to 1, this could prevent a trade from occurring.

Cancelled - Open Cost in particular can occur if you have Trade Options > Account set to a Number of Units that you do not have enough equity to purchase. Also if you have this setting set to Percent of Available Equity, you can also run into issues when using an order delay (such as Realistic Market Prices). The number of shares to purchase are calculated on the signal bar, so if you delay the order and there is a significant change in share price, this can prevent the system from being able to purchase the number of shares it thought it would be able to. This can frequently happen if you have Percent of Available Equity set to 100. Lowering this percent to for example 90 (or less) could help limit these cancellations.

Edited by user Tuesday, September 2, 2025 4:34:04 PM(UTC)  | Reason: Not specified

Originally Posted by: temperino

Thanks for the reply. I actually solved the problem by lowering the percentage of capital invested per trade. The problem remains: how to calculate reinvesting 100% of each trade?

Hello again,

If you want to use Percent of Available Equity at 100 (which we generally do not recommend) and avoid be cancelled out due to Open Cost, the only way I am aware of to prevent this issue is to de-select "Realistic Market Prices" in the Trade Execution tab under the Trade Options settings and set the "Delay Order Opening" field to 0 (and likely change the Buy/Sell/Sell Short/Buy to Cover Price fields to Close). However, this will of course change the execution timing of your trades.