How to Modify Stop Loss Indices Order on MT4

First select the open trade that you want to modify the Stop Loss Indices Order for.

Once you select the open trade - select the modify order button and the following indices trade order popup window will appear and as a indices trader you can use this trade order popup window to modify the Stop Loss Indices Order Level for your new indices trade.

This popup includes the settings for setting Stop Loss Indices Order Level - type in your new SL stop loss level and Click the "Modify" button to modify the Stop Loss Indices Order to your open indices trade.

How to Modify Stop Loss Indices Order on MT4