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Open a position by placing a buy (long) or sell (short). A market order can be placed to trade immediately at the best available price, or a limit order can be placed to specify a worst price for execution or for a resting order. Once your trade has filled, you will hold an open, margined position. Close your position by trading the opposite direction for the same size, or with a reduce-only, take-profit, or stop-loss order for more control and/or automatic triggering. Perpetual positions on Arcus within the same account are automatically netted so that opposing buy/sell trades will reduce existing positions when applicable before opening a new position.