Trading here routes through Bucket Shop's real integrator partnership with Lighter, an order-matched perps exchange on Robinhood Chain, not a Bucket-Shop-operated market. Margin, PnL, and fees are all in USDG. Opening a position in the same market and direction as one you already hold adds to it, since it's one netted position per market, not separate trades. The button above will say Add to Long/Short when that's the case. Every position can be closed fully or partially, just enter any amount up to the position's own value before clicking Close.