The Risk Limit interface is located on the left-hand side of the BTSE exchange, below Margin Mode / Leverage. Risk Limit refers to your position size relative to the amount of leverage you are using.
Initial margin is the capital (money) you need in your wallet to open a trade. The starting risk limit for initial margin when trading Bitcoin Perpetual Futures Contracts (BPFC) is 1% for every 100,000 contracts. Essentially, this means you need at least 1% of the value of your order available in the wallet of the product you are trading.
If you want to place a 100,000 BPFC order (equal to 100 BTC), while BTC is trading at $10,000, you need at least $1,000 in your Bitcoin Perpetual Futures Wallet to open the position. After the trade opens, you only need $500 in that wallet to keep the trade open. This means you can stay in your trade without liquidation, even if the price goes against you by a certain amount. Liquidation, however, still occurs if that trade goes too far in the red, bringing your wallet capital below $500.
You can also change your risk limit by moving the slider on the risk limit setting. Moving your risk limit to 200,000 BPFC (200 BTC) increases your initial margin requirement to 1.5% and your maintenance margin requirement to 1%. Moving your risk limit to 300,000 BPFC (300 BTC) increases your initial margin requirement to 2% and your maintenance margin requirement to 1.5%.