Liquidation Mechanics on MC Markets: Margin Call, Mark Price, and Leverage Tiers

Introduction

Liquidation is the most consequential thing that can happen to a leveraged position — and the most misunderstood. This guide walks through MC Markets' liquidation engine exactly as described in the official Trading Guide: when a Margin Call fires, when liquidation actually triggers, why everything is referenced to Mark Price, how Cross-Margin shares collateral across your positions, and what the leverage tiers look like for crypto and precious metals.

The platform's own framing is direct: liquidation is transparent and rule-based, providing buffers for risk management. Your job as a trader is to use those buffers — not test them.

1. The Core Principle: Two Thresholds, Two Stages

Liquidation isn't a single event. It's a two-stage process designed to give you time to react before forced close-out occurs.

The mechanism is governed by your margin ratio — broadly, the relationship between your account equity and the maintenance margin required to keep your positions open. Two specific thresholds matter:

• Margin ratio falls below 100% → Margin Call. The system issues an alert, prompting you to deposit additional funds or reduce your position in a timely manner. This is your structured warning before anything is closed.
• Margin ratio continues falling below 50% → Liquidation triggered. The system initiates the close-out process. At this point you no longer control the exit — the engine does.

The gap between these thresholds is intentional. It's the buffer that lets a disciplined trader respond to adverse moves — by adding margin, reducing position size, or closing manually — instead of relying on the engine. By the time liquidation fires, the buffer is already gone. Stay ahead of the 100% Margin Call, not at it.

2. Trigger Basis: Why Mark Price, Not Last Price

Both thresholds are evaluated against Mark Price, not last traded price. The reason is simple and structural: last price can be moved by a single large order or a momentary anomaly on a thin order book, and using it as the liquidation trigger would expose every leveraged trader to one-tick manipulation events.

Mark Price is a fair-value reference designed precisely to be robust against these single-venue distortions. Your liquidation will not fire because of one rogue print. (See the Pricing & Execution guide for full Mark Price construction — Mid Price plus impact cost.)

3. Real-Time Monitoring and Alerts

The platform runs real-time monitoring across your positions, with alerts when you're nearing the liquidation threshold. The purpose of the alert layer isn't to scare you — it's to buy you time: time to add margin, time to scale down a position, time to close manually on your own terms.

Two practical habits to internalize:

• Don't dismiss the Margin Call alert. It's the platform telling you the buffer is half-spent. Ignoring it doesn't make the math go away.
• Decide before you open the position what you'll do if the alert fires. Pre-commitment is much easier than improvisation while watching a position bleed.

4. Margin Modes: Cross-Margin Is the Default

MC Markets defaults to Cross-Margin. The defining property: margin is shared across all your cross-margin positions for maximum capital efficiency.

Two consequences worth understanding:

• Better staying power on individual positions. A single bad trade is much harder to liquidate because it can lean on the equity of every other position — and on your free balance — to stay alive.
• Linked risk. Cross-margin trades are economically connected; an unexpected violent move can affect every position at once. The same shared pool that protects each individual position also means a single very bad trade can drain capital from across the account.

A subtle but important point from the official documentation: for cross-margin, unrealized PnL auto-contributes as new initial margin. In plain language — when one position is profiting, that floating gain is automatically available as collateral for the rest of your positions. This boosts capital efficiency dramatically, but it also means a sudden adverse move that turns floating gains into floating losses can tighten margin across multiple positions simultaneously.

For users who want a hard cap on per-position loss, Isolated Margin is the alternative — but Cross is what the platform ships with by default.

5. Initial Margin: The Formula That Defines Your Position

When you open a position, the platform locks an initial margin based on one formula:

Initial Margin = Position Size × Mark Price ÷ Leverage

A worked example. You go long 1 BTC at a Mark Price of $50,000 with 10× leverage:

Initial Margin = 1 × $50,000 ÷ 10 = $5,000

That's the collateral that gets locked when the position opens. The remaining $45,000 of notional exposure is effectively borrowed against your collateral.

For cross-margin positions, the formula gives you the initial lock — but as covered above, unrealized PnL on other positions auto-contributes as new initial margin. So your effective collateral is dynamic, not just the static initial amount.

6. Tiered Floating Leverage: Why Bigger Positions Get Less

Many beginners assume leverage is fixed — pick "50×" and you can always open a 50× position of any size. On MC Markets, that's not how it works.

MC Markets uses tiered floating leverage. The maximum leverage allowed depends on the notional size of the position you're opening. Larger positions require higher MMR (Maintenance Margin Requirement) and lower max leverage.

Why? Because larger positions are harder to liquidate cleanly. A whale-sized position selling into a thin order book causes cascading slippage that hurts other traders and stresses the insurance fund. By stepping leverage down as size goes up, the platform keeps the system stable — including for the trader holding that big position.

7. Example Leverage Tiers

The official Trading Guide publishes these tier examples:

Crypto (BTC / ETH / SOL):

• Notional 0 – 500,000 USD → max leverage 50×
• Notional 500,000 – 1,000,000 USD → max leverage 25×

Precious Metals (XAU / XAG):

• Notional 0 – 2,000,000 USD → max leverage 200×
• Notional 2,000,000 – 3,000,000 USD → max leverage 100×

Tiers may extend further for larger notional values; always check the live tier table on the platform before scaling into size — the official documentation is the source of truth.

Practical implication: Adding to a winning position can quietly tighten your liquidation distance if the new total size pushes you into a stricter tier. The leverage you used on a small entry isn't the leverage you can keep at full size.

8. Putting It All Together: A Risk-Aware Trade

A leveraged trade that respects this entire structure looks like:

• Size first, leverage second. Decide the dollar loss you're willing to accept, then use the formula to choose position size and leverage that produce that loss at your stop level — not the other way around.
• Choose your margin mode deliberately. Cross for capital efficiency when you understand correlations across your positions; Isolated when you want a hard ceiling on per-position loss.
• Check the leverage tier for the size you're targeting, especially if you plan to scale in.
• Set a stop-loss before the position is open — and set it well before the maintenance threshold. Never let liquidation be your stop-loss.
• Treat the Margin Call as a hard decision point, not a notification to dismiss. Pre-commit to the response: add margin, reduce size, or close out.

Liquidation doesn't reward conviction. It rewards discipline. The traders who survive long enough to compound aren't the ones with the boldest entries — they're the ones whose accounts are still standing after the inevitable bad trade.

9. Quick Recap

The five ideas worth keeping:

• Two thresholds: margin ratio below 100% triggers a Margin Call (alert); below 50% triggers liquidation (forced close-out). The 50-point gap is your buffer to act.
• Mark Price is the trigger basis — designed to prevent erroneous liquidations from single-venue manipulation.
• Cross-Margin is the default, sharing collateral across positions for capital efficiency. Unrealized PnL auto-contributes as new initial margin.
• Initial Margin = Position Size × Mark Price ÷ Leverage. This is the static lock at position open; effective collateral is dynamic in cross-margin mode.
• Tiered floating leverage caps max leverage by notional size. Crypto: 50× up to 500K USD, 25× from 500K–1M. Precious Metals: 200× up to 2M USD, 100× from 2M–3M. Always check the live tier table before scaling in.

Risk Disclosure

The mechanics, thresholds, formulas, and leverage tiers described here reflect MC Markets' current implementation as published in the official Trading Guide and may be updated; always consult the official documentation for the most current parameters. Leveraged trading carries substantial risk and can result in losses exceeding your initial deposit. Past performance does not guarantee future results. Trade only with capital you can afford to lose, and consult a qualified financial advisor if you are unsure whether leveraged products are appropriate for your situation.

Asset	Notional N (USD)	Max Leverage L
Crypto (BTC/ETH/SOL)	0 -- 500,000	50×
	500,000 -- 1,000,000	25×
Precious Metals (XAU/XAG)	0 -- 2,000,000	200×
	2,000,000 -- 3,000,000	100×