1) Fast (period = 7 bars)
2) Color of bars
If less than 30 is also 4 red candles in a row - to open long-position
If more than 70 is also 4 green candles in a row - to open short-position
If long-position is open and there is 1 green candle - to close a position
If short-position is open and there is 1 red candle - to close a position
Very dangerous thing! Strategy will close a position only if a position profitable. Most likely you will lose all money if you use this function.