If you're day trading a currency pair like the GBP/USD, you can risk $50 on each trade, and each pip of movement is worth $10 with a standard lot (100,000 units worth of currency). Therefore you can take a position of one standard lot with a 5-pip stop-loss order, which will keep the risk of loss to $50 on the trade. That also means a winning trade is worth $80 (8 pips x $10).
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