Availability of margin trading services is subject to certain limitations and eligibility criteria.
Free margin is the amount of your trade balance that is available for opening new spot positions on margin.
Free margin is calculated as equity minus used margin.
For example,
- With equity of 8,750 USD, and
- used margin of 2,500 USD,
- free margin would be 8,750 - 2,500 = 6,250 USD.
This error will also show when open orders are locking up collateral. In this case closing open orders may allow you to open the position.