How can trades be disabled usually?

These days my trades were always disabled.
When my EA opened orders, it always failed with error: "Trade is disabled".
What can be the possible reasons?

The problem might be from the EA you are using and your brokers terms of condition. The best solution is to call your brokers online chat and find out what the real issue is ,whether your EA is breaching or violating their clients agreement and terms of condition or the real course of the issue. Good luck

You became too profitable and the banks are after you.

I Think You Use Micro Account And The EA Adjusted To Open EURUSD not EURUSDmicro
So, See The Setting And Correct The Pair Name In The EA.