Python量化分析，计算KDJ

Python: v3.6

Pandas: v0.23.4

使用以下方法计算与国内财经软件显示一致

    low_list = df['最低价'].rolling(9, min_periods=9).min()
    low_list.fillna(value = df['最低价'].expanding().min(), inplace = True)
    high_list = df['最高价'].rolling(9, min_periods=9).max()
    high_list.fillna(value = df['最高价'].expanding().max(), inplace = True)
    rsv = (df['收盘价'] - low_list) / (high_list - low_list) * 100

    df['K'] = pd.DataFrame(rsv).ewm(com=2).mean()
    df['D'] = df['K'].ewm(com=2).mean()
    df['J'] = 3 * df['K'] - 2 * df['D']

注意：

1、别使用TA-Lib进行计算（如使用talib.STOCH（）方法），计算结果与国内的财经软件不一致

附：KDJ金叉死叉计算方法

df['KDJ_金叉死叉'] = ''
kdj_position=df['K']>df['D']
df.loc[kdj_position[(kdj_position == True) & (kdj_position.shift() == False)].index, 'KDJ_金叉死叉'] = '金叉'
df.loc[kdj_position[(kdj_position == False) & (kdj_position.shift() == True)].index, 'KDJ_金叉死叉'] = '死叉'