Backtesting and demo difference

[Setsuna]

Hello
I have devolope a expert advisor. But according to backtest I should make 15 trade with 20eu profit. But in the demo account i make 8 trades with 6eu lost. Spread are the same(current) with 1 Hour chart.

Pls help me

[fxDreema]

Which one appears to be wrong? I mean, you know the rules of trading, you probably can find the places where the EA should make a new trade, but didn't. Also check if there are error messages