CFDs are a leverage product and can involve a significant risk of loss. Trading CFDs may not be suitable for all, therefore you should ensure that you understand the risks involved and take into account your individual circumstances.
FAQ FxPro Metatrader 5

Why is the ‘Modify’ button greyed-out when I try to set stop-loss or take profit levels for an existing order?

If the ‘Modify’ button is greyed-out when you try to set stop-loss or take-profit levels for an existing order, it may be because you have placed your stop-loss or take-profit levels too close to the current price. Alternatively, it may mean that you have set these levels on the wrong side of the current price.

Please note that for short positions (sell orders), stop-losses must be set higher than the current market price and take-profit levels must be set lower than the current market price.