Basically what you have coded is a break out strategy that only trades during the European and US sessions on breakouts of the Asian session high and low. This will always work better in trending markets than in sideways markets so adding a market sentiment filter of some sort might help. Also separating the strategy into two strategies – a long only and a short only might also be beneficial as when the Asian session ends with very close high and low then it is very likely that you will open a trade and quickly get stopped out in a reversal – and possibly many times! Having separate strategies allows you to play a little with different stop ideas other than relying on a breakout in the opposite direction for a stop which could be very close or very far away depending on Asian session volatility.
