通达信BARSLAST函数使用详解

BARSLAST函数‌用于计算上一次特定条件成立到当前周期的次数。其基本用法是:BARSLAST(X),其中X是条件表达式,函数返回上一次X条件成立到当前周期的次数‌12

用法示例

  1. 计算上一次20日均线与60日均线金叉到当前的周期数‌:

    T:=BARSLAST(CROSS(MA(C,20),MA(C,60)));

    这表示计算上一次20日均线与60日均线金叉到当前的周期数‌23

  2. 查找上一次收盘价大于开盘价的那一天到现在的周期数‌:

    T:=BARSLAST(C>O);

    这表示计算上一次收盘价大于开盘价的那一天到现在的周期数‌4

  3. 查找上一次涨幅超过15%的那一天到现在的周期数‌:

    T:=BARSLAST(C>1.15*REF(C,1));

    这表示计算上一次涨幅超过15%的那一天到现在的周期数‌4

应用场景

  1. 通过REF函数回溯数据‌:例如,在获取上一次20日均线与60日均线金叉到现在的周期数后,可以使用REF函数回溯到金叉时的收盘价:
    A1:=REF(C,T); // 获取金叉时的收盘价
  2. 确定区间‌:在某个区间内寻找满足特定条件的K线。例如,在MACD指标中,可以结合CROSS函数检测金叉,使用BARSLAST函数获取DEA上穿零轴到现在的周期数,以及使用COUNTIF函数统计DEA上穿零轴后金叉的次数,从而筛选出在MACD零轴之上首次金叉的股票‌5
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