Combines every buy into one average entry. The average is weighted by coins bought, so equal-sized buys at lower prices pull it down more than a simple average of prices.
100 USDT at 60,000, 50,000 and 40,000 (no fee): 0.0061667 BTC, average 48,648.65.
Reference only, not investment advice. Exchange rules (maintenance margin tiers, fee tiers, funding intervals) change; check your exchange before trading.