竖立三明治蜡烛图形态是看涨反转形态，通常是对趋势反转的确认。
该形态由两根阴烛和它们之间的一根阳烛形成。两根阴烛的收盘价应该相同。此处确认了支撑位，并且趋势很可能反转。
1. 趋势向下时，一根阳烛跟着一根阴烛，价格在阴烛收盘价上方交易。
2. 第三根蜡烛是阴烛，其收盘价和第一日阴烛的收盘价相同。
市场上看到持续下跌趋势。下一日市场高开，并且当日交易上涨并收高。这样的价格运动显示之前的下跌趋势可能已经反转，而短期交易最好结束，或者防止止损单进行保护。下一日的开盘价继续走高，并且交易大量结束。此后，价格走低，收于两天前的水平。
如果看不到支撑和阻止位，你可能面领着高风险。下一个交易日将提供市场情况的更多线索。
根据日本交易指导，两根阴烛的支撑位在低点。收盘价附近的支撑位有效期更长，因此趋势反转的机会很高。
如果第一根阴烛远远短于第三日的交易范围，那么竖立三明治将转换为倒锤形态。如果如果第一日烛体是第三日交易范围的两到三倍，那么形态转化为看涨倒锤形态。
如果这些条件不满足，那么竖立三明治的阴烛走低，最终确认了看跌的形态。
最后两天的形态常常看起来像是看跌吞没。有时最好注意支撑位而不是不注意之前的趋势，只注意看跌蜡烛形态
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