請問在選股腳本中，寫了日週月kd同時金叉，回測時只有月kd金叉，請問語法怎麼修正?謝謝

value1 = xf_Stochastic("D",9,3,3,value2,value3,value4);

//value2 = RSV, value3 = K, value4 = D

if value3 < 40 and value4 < 40 and value3 cross over value4 then ret = 1;

// K, D 都小於40且K向上穿越D

value1 = xf_Stochastic("W",9,3,3,value2,value3,value4);

//value2 = RSV, value3 = K, value4 = D

if value3 < 40 and value4 < 40 and value3 cross over value4 then ret = 1;

// K, D 都小於40且K向上穿越D

value1 = xf_Stochastic("M",9,3,3,value2,value3,value4);

//value2 = RSV, value3 = K, value4 = D

if value3 < 40 and value4 < 40 and value3 cross over value4 then ret = 1;

// K, D 都小於40且K向上穿越D