Or you can put any calculation using native MQL4 functions here: http://prntscr.com/7hkq7t
Because not everything in MQL4 is hard to do. For example, the Ask price can be get by simply writing Ask. Ask is predefined variable. Also Bid.
http://docs.mql4.com/predefined/ask
Some account data is also easy, for example AccountBalance() is giving us the current balance: http://docs.mql4.com/account/accountbalance
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