Hey Centcel,
The problem is very obvious – you have 2076 bars!!! You can not create strategies with so small number of bars. Look again at the videos of Petko. He uses around 100 000 bars on M15. Or you look at the MetaTrader-Demo Data source in EA Studio it has over 100k bars for the assets.
2k bars is small number mate, you need to collect the data or find a broker with more bars. But all at the beginning show a small number of bars. You can guess why :)