Hi Thomas, indicator is not working for me. I tested on 2 different MT4 and I see below 2 errors

Thanks

I was able to replicate your error. It is because you tested it at 23.25 and 23.17 when the spread is to big. Check with fixed spread or before 23.00 or after 24.00 when spread is more normal.

Works fine on my mt4 on all pairs I have tested as long as spread is bellow 10 pips

I tested multiple pairs and time frames and still no arrows. What could be the reason ?

I do not see errors as well. 

In the testerfunction? In live chart it will not paint arrows back in time.