What Is Auto-Deleveraging (ADL)? How It Works in Perps Trading
Auto-deleveraging (ADL) is a last-resort mechanism used by perpetual futures exchanges to handle situations where liquidated positions cannot be fully covered by the trader's margin or the insurance fund. When ADL activates, it forcibly closes portions of profitable opposing traders' positions to offset the deficit. While rare, understanding ADL is essential because it can affect any trader holding a winning position during extreme market conditions.
How ADL Works
The ADL process follows a specific sequence:
- A trader's position is liquidated because their margin is depleted
- The liquidation engine attempts to close the position on the open market
- The execution price is worse than the bankruptcy price, creating a deficit
- The insurance fund is checked but has insufficient balance to cover the loss
- ADL activates and selects opposing traders to absorb the deficit
Who Gets Auto-Deleveraged?
ADL does not randomly select traders. Exchanges rank all traders on the opposing side using a priority queue, typically based on two factors:
| Priority Factor | Description |
|---|---|
| Profit ratio | Traders with higher unrealized profit percentage are deleveraged first |
| Leverage used | Among equally profitable traders, those using higher effective leverage are targeted first |
This means a trader holding a large unrealized gain at high leverage sits at the top of the ADL queue. A trader with a modest profit at low leverage is near the bottom.
Practical ADL Scenario
Here is a concrete example of how ADL unfolds:
- BTC is trading at $50,000. Trader A opens a 40x leveraged short with $1,000 margin (position size: $40,000)
- BTC suddenly spikes 5% to $52,500 in seconds due to a short squeeze
- Trader A's position should have been liquidated at approximately $51,250, but the rapid move means the liquidation engine closes it at $52,500
- Trader A's $1,000 margin covers only part of the $2,500 loss on the position, leaving a significant deficit
- The insurance fund has insufficient balance to cover the gap
- ADL targets the most profitable long traders to close enough of their positions to cover the remaining deficit
Trader B, who has been long BTC with a 30% unrealized gain at 20x leverage, gets a portion of their position auto-deleveraged at the current market price.
ADL Indicators
Most exchanges provide an ADL indicator that shows your position's rank in the priority queue. This is usually displayed as a series of bars or lights next to your open position:
- All bars lit: You are at the top of the ADL queue and most likely to be affected
- Some bars lit: Moderate ADL risk
- No bars lit: You are at the bottom of the queue and least likely to be affected
Checking this indicator regularly, especially during volatile markets, helps you assess whether your position is at risk.
How to Minimize ADL Risk
1. Take Profits Regularly
Locking in gains by setting take-profit orders or manually closing portions of your position reduces your unrealized profit ratio, moving you down the ADL queue.
2. Use Lower Leverage
Positions with lower effective leverage rank lower in the ADL priority. Trading at 5x instead of 20x significantly reduces your ADL exposure.
3. Monitor the Insurance Fund
When the insurance fund balance drops sharply, ADL risk rises for everyone. If you see the fund declining during a volatile period, consider reducing your position size.
4. Avoid Holding During Extreme Events
Major news events, exchange outages, and flash crashes are when ADL events are most likely. If you anticipate extreme volatility, closing positions or reducing leverage is prudent.
5. Diversify Across Assets
Holding all your exposure in a single asset concentrates your ADL risk. Spreading across multiple trading pairs means a liquidation cascade in one market does not necessarily affect your other positions.
ADL vs Socialized Loss
Some exchanges use socialized loss instead of ADL. In a socialized loss system, the deficit from bankrupt positions is spread across all profitable traders proportionally, rather than targeting the most profitable first.
| Feature | Auto-Deleveraging (ADL) | Socialized Loss |
|---|---|---|
| Who is affected | Most profitable traders first | All profitable traders equally |
| Predictability | ADL indicator shows your risk | No way to know your share in advance |
| Impact distribution | Concentrated on few traders | Spread across many traders |
| Common on | Most major exchanges | Some older platforms |
ADL is generally considered the more transparent system because traders can see their queue position and take action to reduce their risk.
What Happens After ADL
When your position is auto-deleveraged:
- A portion of your position is closed at the current market price (not at a worse price)
- You keep the realized profit from the closed portion
- Your remaining position continues as normal
- You receive a notification that ADL has occurred
ADL is not the same as liquidation. You are not losing money; rather, a profitable position is partially or fully closed earlier than you intended.
Related Terms
- Insurance Fund: The reserve that must be depleted before ADL triggers
- Liquidation Price: The price at which positions are force-closed, potentially leading to insurance fund draws
- Leverage: Higher leverage increases both liquidation risk and ADL priority
- Take Profit (TP): Regularly taking profits reduces your ADL queue position
- Perpetual Futures: The derivative contracts where ADL applies
For more on risk management, read about common trading mistakes to avoid.