What is the Index Price for Margin Trading？

CoinEx employs a unique Index Price marking mechanism to ensure that the index prices used in margin trading are fair, stable, and secure. This system calculates the Index Price using weighted prices from various major cryptocurrency exchanges and employs an exception handling mechanism to keep the Index Price within an acceptable range during drastic fluctuations on any exchange. This effectively reduces the risk of forced liquidations due to anomalies, helping users manage margin risks and protect their assets.

The Index Price used in margin trading is a weighted average of spot prices of a cryptocurrency from major exchanges.

Take BTC/USDT​ as an example — the currently included exchanges and their weights are shown in the table on the Index Price page, and all information is subject to what is publicly listed there.

About Index Price

1. Update frequency

The Index Price is updated every 5 seconds, ensuring it reflects real-time market changes while avoiding abnormal price swings caused by short-term volatility.

2. Price conversion mechanism

If a weighted exchange does not offer a particular spot trading pair in the quote currency, CoinEx will calculate the price using other existing pairs and include it in the Index Price.

For example, the price of LINK/BTC is derived as follows:

LINK/BTC = LINK/USDT ÷ BTC/USDT

3. Handling abnormal exchange data

If a weighted exchange is under maintenance, or its latest price and trading volume have not been updated within 15 minutes, CoinEx will temporarily remove that exchange’s weight and redistribute its proportion to other exchanges. This ensures that the Index Price remains stable and reasonable even during data anomalies or missing inputs.