Placing Arrows

How can I place the standard green and red arrows where my trades are opened if I open them for another chart?

Right now I am controlling all buys and sells of both the EURUSD and the USDCHF from the EURUSD chart.  The arrows get placed on the EURUSD chart just fine,,but none show up on the USDCHF.

Here's my order send function:

void Buy(double Lots,int Slippage,int Magic)
{
   int Ticket = OrderSend("EURUSD",OP_BUY,Lots,MarketInfo("EURUSD",MODE_ASK),
            Slippage,0,0,NULL,Magic,0,Green);
            
   Ticket = OrderSend("USDCHF",OP_BUY,Lots,MarketInfo("USDCHF",MODE_ASK),
            Slippage,0,0,NULL,Magic,0,Green);
}