molanis.com/forum - Tools for MetaTrader : The place to ask about the best expert advisor builder, expert advisor downloads, and expert advisor programming

Can anyone summarize how to avoid these common perils that let code run wild?

1. Conditions become true and you open a small position.
Next tick conditions are still true.
How do you keep from opening additional positions?

2. Conditions become true and you open a position.
You get stopped out and immediately open a second position with a new stop.
How to avoid?

3. Conditions are true for one bar then again a few bars later. You want to limit yourself to opening a position only if you have not had a signal in XX bars.

4. You have an EA that you want to trigger one time only and then go dormant until manually reset.

Are these all features the EA builder has already got logic for?

Use the max number of opened positions in the START icon

Use the next trade management option in buy / sell icons. Or create better trading conditions like crosses (see our examples page)


You could build the trading condition using current and past values. It may be a bit long.


The strategy builder does not have dormant or manual reset

Try this: Build 2 separate EA's. One for buying only, and another one for selling only. In each EA's mol, select Wait Until an Opposite Trade is Opened. Change the default magic numbers in one EA's inputs to something new. I'm thinking it should be impossible to enter more than one trade per EA because the opposite trade will never be present to either EA. Good luck.