Formula
Free margin = equity − used margin
Free margin goes up when open trades are in profit and down when they are losing. When free margin reaches zero you cannot open new trades, and your existing positions are at risk of a margin call.
Forex glossary
Definition
The money in your trading account that is not tied up as margin and is available to open new positions or absorb losses.
Updated
SaveFree margin = equity − used margin
Free margin goes up when open trades are in profit and down when they are losing. When free margin reaches zero you cannot open new trades, and your existing positions are at risk of a margin call.
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