If trade was taken by EA(Automatically), the easiest solution is you use:
ChartScreenShot() function after OrderSend() function in your EA.
Otherwise its a bit complicated. First, you must code EA/Indicator check your open trades, once a new order takes, it open a new chart for that pair, next attach Screenshot EA to chart, after takes screenshot close chart.
All processes are possible programmatically, but this needs at least 50-60 lines code.