Most ea on sales on the internet or not on sales does not work durably.
Always the same trick with updates by ea sellers, restarted forward account...after update they show you the new nice backtest, and so on the new updated ea will last 4 months at most. They never show you any live personal account, because they win money by selling you ea, only...
The rare working ea are kept private, like mine, and we do not sell them, but only offer managed accounts, win-win relation.
Let me know by PM if interested