KCEX futures: the one condition behind every liquidation price, and why your TP/SL might not save you

The screenshot above is the public KCEX Futures Trading FAQ, showing the funding fee formula, the PNL formulas, and the liquidation condition.

The condition

KCEX says the liquidation price is calculated from this condition:

Position Margin + Unrealized P&L <= Maintenance Margin

Read it slowly. You have margin in the position. Unrealized P&L is added to it (negative when you are losing). The moment that sum shrinks to the maintenance margin requirement, you are at the liquidation price.

Where the mark price comes in

The FAQ's unrealized P&L formulas use Mark Price, not the last traded price:

• Long: (Mark Price - Average Entry Price) x Position Quantity
• Short: (Average Entry Price - Mark Price) x Position Quantity

So the left side of the condition is driven by Mark Price. A sharp wick on the last price that the mark price does not follow does not, on its own, change your unrealized P&L in this formula.

The formulas KCEX gives (excluding trading fees)

• Long liquidation price = (Maintenance Margin - Position Margin + Average Entry Price x Quantity) / Quantity
• Short liquidation price = (Average Entry Price x Quantity - Maintenance Margin + Position Margin) / Quantity

You do not need to memorise them. What matters is what moves them. More position margin pushes a long's liquidation price down and a short's up, away from danger. A higher maintenance margin requirement, which comes with larger position tiers, pulls it closer.

Funding also feeds the condition

The same FAQ gives the funding fee as Position Quantity at the snapshot time x Mark Price x Funding Rate. Longs pay shorts when the rate is positive and shorts pay longs when it is negative, and KCEX states it does not take a cut of these payments. If you are paying, that comes out of your margin and the left side of the condition gets smaller.

Why TP/SL, trigger and trailing orders can fail

This is the part worth bookmarking. KCEX explains that take-profit/stop-loss, trigger and trailing stop orders do not freeze margin when you place them. They are conditional: only when the condition is met does the system submit the actual limit or market order. If that order cannot be placed at that moment, the strategy order fails to trigger.

The reasons it lists include:

• Insufficient liquidity, with no counterparty at the specified price.
• Insufficient margin, when your available balance is too low at the moment of triggering.
• Futures trading being suspended.

In other words, a stop loss is an instruction, not a reserved exit. If your account is stretched thin, the stop that was supposed to save you might be the order that cannot be placed.

A short checklist

1. Know your liquidation price and check it after funding settlements, not only after price moves.
2. Leave some available balance in the account so conditional orders have margin to work with when they fire.
3. Do not set a stop loss right next to the liquidation price. Give it room so it triggers well before the condition above is met.
4. Watch your position tier. A bigger position can mean a higher maintenance margin rate and a closer liquidation price.
5. Turn on email or app notifications. KCEX says it notifies you whether a trigger succeeds or fails.

The takeaway

Every KCEX liquidation price comes back to one inequality: position margin plus unrealized P&L measured at mark price, against the maintenance margin. Funding and fees nibble at the left side. Stops help, but they are not guaranteed to execute, so the real protection is sizing and spare margin.

Have you ever had a stop fail to trigger, and did you find out why?