Think of equity as the buffer: used margin is collateral reserved for open trades, while free margin is uncommitted. Floating P&L moves equity, which changes how much cushion you have before risk limits or liquidation engines react.
Adding positions stacks requirements
Each new trade increases used margin (and often maintenance margin). Correlated crypto books can draw down together—five “small” alts can still be one macro bet on risk-on liquidity.
Cross-check with a calculator
Preview margin before you click, especially when mixing spot margin and perps or changing leverage tiers.
Pair this article with the margin calculator and your exchange’s contract specs.
Reading the margin meter under stress
When candles accelerate, traders watch price first and margin second. Build a habit of glancing at free margin before each add-on trade the same way you glance at battery before a long flight.
Correlated risk stacks margin silently
Five alt positions can each look “small” in isolation while sharing one macro beta. Correlation tools help you notice when you are making the same bet five times.
- Tag each open trade with its macro theme in your journal.
- Sum margin for the same theme before adding another.
- Reduce size first when free margin shrinks faster than expected.
Recovery playbook
If you hit a margin warning, stabilizers are usually closing the worst-convexity trade or shrinking the largest margin consumer—not tweaking indicators.