Please fix error: empty controlled statement found

[MR.]

if(OrderModify(Ticket,Open_Price,New_SL,TP_Order,0));

[Yashar Seyyedin]

MR.:

if(OrderModify(Ticket,Open_Price,New_SL,TP_Order,0)==false)
{
        Alert("Modify Error!");
}

[Agent86]

MR.:

Yashar has provided a corrected code, but also FYI

Your control statement in question is the extra quotes ")"  you put in your code which I highlighted in yellow.
This is not needed and because it's there the interpreter is complaining about it because there is no code inside of it and is considered empty. 

if(OrderModify(Ticket,Open_Price,New_SL,TP_Order,0));

[Alain Verleyen]

Agent86 #:

Yashar has provided a corrected code, but also FYI

Your control statement in question is the extra quotes ")"  you put in your code which I highlighted in yellow.
This is not needed and because it's there the interpreter is complaining about it because there is no code inside of it and is considered empty. 

There is no extra quotes in the OP code. The problem is the ";" at the end.