I need to run a s_SCNewOrder function only once, upon certain condition being met the first time only (for example price greater than X).

I have been looking at ways to achieve that in C++ (this thread for example c++ - How to make sure a function is only called once - Stack Overflow) but not sure yet how to implement this in ACSIL.

Would anyone here know?

SCENARIO = THERE IS A LONG POSITION WITH AN ATTACHED STOP BELOW

bool flag = true;

//Find PreExistingStop ID
s_SCTradeOrder PreExistingStop;
int StopResult = sc.GetNearestStopOrder(PreExistingStop);
int PreExistingStopOrderID = PreExistingStop.InternalOrderID;

//Get position data
s_SCPositionData PositionData;
sc.GetTradePosition(PositionData);

//Run the following only on the most recent bar
if (sc.Index == sc.ArraySize - 1)
{

//this says execute if flag=true and the distance between the high and the PositionData.AveragePrice is >= 10
if (((max(sc.High[sc.Index],sc.High[sc.Index-1]) - PositionData.AveragePrice) >= 10))
&& flag)
{

int Result = sc.CancelOrder(PreExistingStop.InternalOrderID); // this cancels the PreExistingStop

if (Result > 0) // if PreExistingStop succesfully cancelled enter new sell stop at 1800 and make flag=false
{
s_SCNewOrder NewOrder;
NewOrder.OrderQuantity = 1;
NewOrder.OrderType = SCT_ORDERTYPE_STOP;
NewOrder.TimeInForce = SCT_TIF_GTC;
NewOrder.Stop1Price = 1800;
int Result = sc.SellEntry(NewOrder);

flag = false;
}

}
}

Once the trigger is reached, if flag=true, that 1) cancels the preexisting stop, 2) creates a new stop at 1800, and 3) makes flag=false.

THIS WORKED.

Needed to tinker with the following to get it to work:
sc.AllowEntryWithWorkingOrders = true;
sc.AllowOnlyOneTradePerBar = false;
sc.AllowMultipleEntriesInSameDirection = true;