Hi,
Someone has pointed out really well that this EA needs breathing space. It is a fabulous EA if used appropriately. The problem with some users is that (with all due respect) they use an indicator/EA once or twice and based on that minimal sample size they give their reviews. That should not be the case. Any indicator/EA should be thoroughly testing before giving out a final verdict.
In this signalspro007 v6.0 case, you should backtest it on your MT4 (or whatever platform) to see the optimal lot size and maximal drawdown. I will recommend an account balance of $ 4000 for EUR/USD pair on M15 time frame. The lot size should be 0.02 and maximum trade should be 25. Rest of the setting should be default and it will do wonders for you. But like I said you should backtest it yourself as results vary from broker to broker and from spread to spread and you might find out that this EA is not good for some pairs and that is absolutely fine. You can reject those pairs with this EA.
I hope this helps!