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编写要求：
10日前到10日前的30日内价格一直存在下跌，最近10日内有1-2个涨停，涨停不超过5个的公式。
公式网解答：
ZT:=C/REF(C,1)>1.095 AND C=H;
REF(DOWNNDAY(CLOSE,30),10) AND COUNT(ZT,10)<5;其他写法：
// 参数设置
N1:=30; // 前期观察周期
N2:=10; // 近期观察周期
// 前期30日持续下跌判断(10日前到40日前)
DOWN_TREND := EVERY(C<REF(C,1),N1);
// 最近10日涨停统计(1-2个涨停)
ZT_COUNT := COUNT(C/REF(C,1)>1.095 AND C=H,N2);
ZT_COND := ZT_COUNT>=1 AND ZT_COUNT<=2;
// 历史涨停不超过5个(防新股爆炒)
HIST_ZT := COUNT(C/REF(C,1)>1.095 AND C=H,60)<=5;
// 最终选股条件
XG: DOWN_TREND AND ZT_COND AND HIST_ZT
AND NOT(NAMELIKE('ST'))
AND DYNAINFO(4)>0;该公式实现30日下跌趋势+10日内1-2个涨停的选股逻辑，包含ST股过滤和涨停次数限制。适用于通达信/同花顺软件，可调整N1/N2参数优化周期。
网页唯一标识识别码
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指标使用通用经验总结
- 一般出现信号不急着立即介入，介入时机一般尾盘半小时判断信号是否可介入；
- 指标信号出现后第二天冲高阴线，立即清仓，等待突破上一个信号点最高价判断是是否介入；
- 指标信号出现后第二天阴线或假阳线，立即清仓，等待突破上一个信号点最高价在判断是否介入；
- 在上涨，现价处于上涨高位的『介入、看多』信号不参与；
- 不是信号一出现就介入，要根据市场环境，量价关系，市场情绪等诸多因素判断是否可介入；
- 技术指标有其本身局限性，宁可错过，也不要做错；
- 拿到指标后，多测试，多练习，看是否符合预期，总结规律；
总之一旦信号失真，不符合预期，立即清仓控制风险 ；
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