bool OrderModify	(	int	ticket,
		double	price,
		double	stoploss,
		double	takeprofit,
		DateTime	expiration,
		Color	arrow_color
	)

Modification of characteristics of the previously opened or pending orders

Parameters

ticket	Unique number of the order ticket
price	New open price of the pending order
stoploss	New StopLoss level
takeprofit	New TakeProfit level
expiration	Pending order expiration time
arrow_color	Arrow color for StopLoss/TakeProfit modifications in the chart. If the parameter is missing or has CLR_NONE value, the arrows will not be shown in the chart

Returns

If the function succeeds, it returns true, otherwise false. To get the detailed error information, call the GetLastError() function.

Open price and expiration time can be changed only for pending orders. If unchanged values are passed as the function parameters,
the error 1 (ERR_NO_RESULT) will be generated.
Pending order expiration time can be disabled in some trade servers. In this case, when a non-zero value is specified in the expiration
parameter, the error 147 (ERR_TRADE_EXPIRATION_DENIED) will be generated.