Most usefull in lower timeframes. Start trading when green line crosses the red line!
I think in this picture you use very high timeframe. i will show you one screen from mt4 station.
Entry to the direction if red line crosses the blue one! Using RSI can filter some signals.
Can you create at first an indicator which shows the two lines like in example picture havin the signals on the chart? Signal/strategy can be create after testing it with rsi filter an so on...