Quote from: Charles-Tim on Today at 11:12:35 AM

You can do it on exchanges that support future trading. All you have to do is to change from one-way mode to hedge mode.

One-way mode
This means once a position is opened, you can not add asset to it to increase your liquidation price range so the chances of getting liquidated is reduced.

Hedge mode
Assuming you open a short position for bitcoin, but bitcoin price increase, and your funds is about to liquidate at $45000 as bitcoin price is increasing, if you want to be able to add more collateral to your future account so that there will be no liquidation, then you will have to change one-way mode to hedge mode so if you transfer more asset to your future account, the risk of getting liquidated will reduce as the price can change from $45000 to a higher price before liquidation.

You can try any exchange that support future trading, such exchange will support hedge mode. You can try Binance but it requires KYC or try FTX.

Note: future trading is subjected to high risk, do not use the amount you can not afford to to lose trade. The higher the leverage used the higher can be the losses, do not only be thinking of the profit.

I think, judging by the description, futures are not suitable for him, since the system is different there. Move the liquidation price by changing the average price and leverage, without additional obligations.