Calculate the used margin per trade

Hello all,

I am new here and im trying to build my first EA, i have a few questions tho, if possible i would like some help here

how can i calculate the margin value of a new trade in diferent pairs before i open the trade?

How can i calculate the pip value of a trade in diferent pairs and diferent trade sizes?


Thanks very much

double AccountFreeMarginCheck( string symbol, int cmd, double volume)
Returns free margin that remains after the specified position has been opened at the current price on the current account. If the free margin is insufficient, an error 134 (ERR_NOT_ENOUGH_MONEY) will be generated.
Parameters:
symbol - Symbol for trading operation.
cmd - Operation type. It can be either OP_BUY or OP_SELL.
volume - Number of lots.



double MarketInfo( string symbol, int type)
Returns various data about securities listed in the Market Watch window. A part of information about the current security is stored in predefined variables.

Use MODE_TICKVALUE for the type, this will return the tick value for a standard lot.