Short the current markets

I created a strategy that short the markets. This is my second attempt and took me 5 nights to compile. The barmerge indicator is my trigger to enter a short position. I used the USDJPY to test my strategy because it caused havoc the past week.

Please i need some of the gurus to look at my strategy and tell me where to improve. I would like to learn the coding especially the forex markets.

Let me know what you think.