How do i remove those autotrade arrow on the chart - page 2

 

Go to  File >Open Data Folder>MQL Folder> Expert Folder Delete > Advisor Folder & Example Folder delete all preloaded stuff . If Problem not solved uninstall MT5 use Mt4. 

Hope this helps

 
How to delete it automatically?
 
Right click on screen will show a drop menu, then click on TRADE HISTORY. It will never show that autotrade arrow again. 
Reason: