When putting code in your topics or posts it is better if you add it to the text via the ‘Insert PRT Code’ button rather than attach a screenshot of it.

If you send a BUY order and a SELL order to the market at the close of a bar then they will just cancel each other out and no orders will be placed. On the first bar you won’t have anything to sell so you will open one trade and then never close it.

Your code works fine and exactly as I just described on my v11 platform.

Is your internet fast? Often slow back tests will drop out with an error if the internet fails although I can’t see that being the issue with your code which doesn’t actually do anything but open one trade and never close it!

x70 – Please do not post the same question in multiple forums. Your original post in the Italian forums was sufficient. All the forums are monitored by moderators and we have a particularly good Italian moderator who could easily help you. In fact I now see that he already asked you not to double post but you did anyway. You will gain nothing from posting the same question multiple times. In fact the opposite as double posting just wastes peoples time and leads to confusion. If you post this same question again elsewhere then it will be deleted.

I will not delete this topic for now and leave it as an example to others of how not to behave in the forums! Please respect the forum rules with your future posts and topics.