I have attached 3 scripts that will help you to modify the price, the Stop Loss and Take Profit of a pending order.
Once you have added a pending order to your chart with a SL and a TP use the following scripts:
Delete a Pending Order by Point and drop over the price order (green dashed line)
Select the pending order you want to delete when you have severals pending orders on a same chart by point and drop over the price of the pending order you want to delete.
Drop Pending Sell Script
This script opens a pending sell order by just point and drop the script in the place you want.