The SAR is a technical indicator plotted on a price chart that will occasionally intersect with price due to a reversal or loss of momentum in the security in question.
香港特区是一个技术指标绘制图表，价格偶尔会交叉价格由于逆转或失去动力，安全的问题。
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Because adding to positions changes the total cost of the entire position on a per-unit basis toward the last price, a quick reversal to the original entry price can result in a significant loss.