A popular method for determining if a strategy should be kept trading is trading the equity curve. What this means we apply an indicator, say 200-day moving average, to the equity curve. When the equity curve falls below this value we stop trading. We then continue to paper trade the strategy until it gets above the moving average and then trade it live again. The general idea being that you get out when the strategy is doing poorly and get back in when it is doing well. Also once a strategy breaks, this gives you a simple way of getting out of it.
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Good Quant Trading,
Cesar
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