Backtesting Issue in MT5: Worked Once and Now It Doesn’t

New comment
 

I’m experiencing an issue with the Strategy Tester in MT5. The first time I ran a backtest with my trading algorithm bot, it worked correctly and completed the test without any problems.

However, after that, I loaded a different bot and the backtest did not execute. I initially thought the issue might be related to that specific bot, so I tried running the first bot again — the one that had previously worked — but now it also fails to run the backtest.

At this point, none of the bots are executing in the Strategy Tester. The simulation simply does not start.

I have not made any additional changes to the configuration (dates, symbol, data model, etc.), and everything appears to be set up exactly as it was when it worked the first time.

Has anyone experienced a similar issue or knows what settings I should check?

 
Please, provide the tester logs.
 
I've encountered that before — there was too much data and the disk was full. It was fine after I cleaned it up.
 
MT5 backtest may fail if disk is full or tester cache is corrupted. Clear temp/history files, check Logs/Tester, and restart MT5.
New comment