A highly accurate arrow Forex MT4 indicator that I use myself, and it comes with the source code.
This is a very good indicator. I usually use it on higher timeframes. Honestly, it has some repainting, but sometimes it performs very well, especially when I use it in conjunction with another indicator, the Traders Dynamic Index. If both indicators give trading signals, the accuracy is quite high. I typically use it on the H1 timeframe.
Traders Dynamic Index indicator download link: http://www.eadashi.com/jishuzhibiao/2258.html