Calcullator

calculator to my broker

it needs be able for all 256 symbols

formula is:

Margin is calculated using the following formula: Margin Required = (current market price x volume) / account leverage In practice this would be calculated as follows: If you open a position of 0.1 (10000) in GBP/USD at the market price of 1.65645 and your account has a leverage of 1:500 you would calculated the margin required as follows: (1.65645 x 10000) / 500 = $33.13 In this example the margin on this position would be $33.13, therefore in order to open a positions of this size you would require at least $33.13 in free margin in your trading account.

but leverage and lot varies; it is necessary check each one

plot in chart after set lot

source free