Three checks before a futures trade: will leverage liquidate you before your stop, what do fees cost you each month, and how big should the position be for the amount you are willing to lose.
Amounts are in USD / USDT. Optional LKR figures use 332.41 LKR per USDT (2026-10-28; Central Bank of Sri Lanka indicative USD/LKR spot rate (USDT taken as 1 USD)). The official rate is for US dollars: people buying USDT from P2P sellers usually pay a different, often higher, rate, so check your own.