Direct answer
Total margin on forex is the total amount of money set aside (reserved) by your broker to support your currently open positions. Put simply: it is the combined margin requirement for all trades you have open at the same time.
Total margin is not the same as your balance. Balance is historical and does not fluctuate with the market. Total margin is tied to what you currently hold open, and it can change as your open positions change.
How total margin works
To understand total margin, it helps to connect three common account concepts:
- Equity: your account value including floating profit or loss (the profit or loss from open trades that has not been closed yet).
- Used margin (margin used): the margin currently reserved for open positions.
- Free margin: the part of equity not reserved for margin use.
In many broker interfaces, total margin is shown as the sum of the margin required across all open positions, which closely matches what others label as used margin. When you add a new position, close a position, or when the market moves, the required margin and/or your equity can change—so your total margin picture changes too.
What changes it
Total margin typically increases when:
- you open additional positions, or increase position size
- your broker’s margin requirements for those instruments/conditions imply more reserved capital
Total margin relative to equity can decrease if floating results improve equity, even if the reserved amount stays the same. Conversely, unfavorable price movement can reduce equity and increase margin pressure.
Example checks and comparisons
Because broker dashboards label items differently, an independent way to verify the concept is to cross-check fields that are usually available:
- Locate equity and your margin used/total margin for open trades.
- Compute or compare free margin (often shown directly) with equity minus margin used.
- Open or close a position (in a paper-account or with small sizes) and observe which field increases, decreases, or stays constant.
If you see that “total margin” rises when you add or enlarge open positions, and “free margin” falls, that behavior matches the reserved-capital meaning. If your platform uses different wording, use the relationship between equity, used margin, and free margin to interpret it.
Limitations and risks
- Labels vary by broker: “total margin” may correspond to “margin used” or a similarly defined measure. Treat the exact field name and calculation method as broker-specific.
- Not a profit figure: total margin is about capital reservation for open trades, not the amount you have earned.
- Margin pressure depends on relative levels: the risk becomes material when reserved margin grows relative to equity and free margin. The exact thresholds and automated actions (like stop-out behavior) depend on broker rules, which can differ.
- No guaranteed outcomes: market movement and floating profit/loss are uncertain, so you cannot infer future results from a current total margin value alone.
For a deeper related concept, you can compare this to how margin pressure can trigger protective mechanics under your broker’s conditions: avoiding margin pressure.