It will just clutter the charts. And besides, the bigger the arrows, the difficult it would be to determine the actual bar its pointing at. Thanks for you comment. Please add more if you see things that needs further improvement. Godbless and keep safe always.

I tried this as backtesting EA, it's not executing any order

Sorry but I already stopped checking on this. But I am now in the process of creating an EA with machine learning abilities to predict potential trend. As of now, it already generates prediction but the execution for automatic trading is still in manual mode including the closure of each order. Rest assured I will be sharing it with everyone here soon. Check out this post for your reference. You can also message me there. I have done a couple of trades recently and I hit the TP thrice for each of my 3 trades. Have a great day. 

https://www.facebook.com/SuccessUnlimited101/posts/pfbid02vNtVGkqa3GTm6tE4D2PjAHwafU1NbJZsGQe6nASa93WwEkiQTiBeUq2cP4ZfixTal

Good day sir. I just created a FREE signal you can use in an XM Ultra Low Standard demo account to test it.