Return on investment (ROI) measures the performance of your open positions by comparing unrealized profit and loss against position margin. It can be viewed as a reflection of the performance of your current investment.

ROI = unrealized PnL (USDT) ÷ position margin (USDT)

For example, if you use a position margin of 300 USDT to trade BTC/USDT futures, and your current unrealized profit is 500 USDT.
The ROI would be:

ROI = 500 ÷ 300 = 166.6%

Note: ROI provides insight into the performance of your active trades, but it only reflects unrealized profit or loss. It does not represent final gains or losses.