What's mark price vs last price vs index price?

X-Perps trading uses multiple price references. Understanding the difference is important because different functions may rely on different prices.

What's last price?

Checklist

1. X-Perps trading uses multiple price references. Understanding the difference is important because different functions may rely on different prices.
2. What's last price?
3. The last price is the price of the most recent executed trade in the market.
4. It's useful for:
5. seeing recent trade activity
6. charting and short-term market behaviour
7. What's index price?
8. The index price is a reference price derived from external spot market sources.

Notes

The last price is the price of the most recent executed trade in the market.

It's useful for:

seeing recent trade activity

charting and short-term market behaviour

Details follow the official OKX help article; this page is a learning checklist, not an official mirror.