How to open multiple OrderSend() in MQL4 Metatrader 4?

Ok. When you deploy your EA/script on chart, it uses information about chart(symbol, timeframe and others - they are pink as a rule in editor)

So, when you deploy an EA on, suppose EURUSD, chart, it goes to line:

profitlvl_buy = Ask+takeprofit*Point;

and thinks that "Ask" is definitely Ask of EURUSD (or in other words, Ask price of the chart _Symbol ) then you request to send trades on GBPUSD, having takeprofit and stoploss calculated for EURUSD, so I suppose takeprofit is incorrect. I.e. Ask is 1.12 and takeprofit is 1000 ticks so tp = 1.13 and price of GBP is 1.33, takeprofit cannot be ( for orders at Market ) below a trade entry.

In order to fix:

double ask  = MarketInfo( "EURUSD", MODE_ASK );
int ticket1 = OrderSend(  "EURUSD", OP_BUY, lots, ask, 10, ask-stoploss*Point, ask+takeprofit*Point, NULL );

       ask  = MarketInfo( "GBPUSD", MODE_ASK );
int ticket2 = OrderSend(  "GBPUSD", OP_BUY, lots, ask, 10, ask-stoploss*Point, ask+takeprofit*Point, NULL );

also it is usually a good practice to make sure ticket returns int number ( in case of success ) or -1 and in such case prints code of an error, in this case - error#130