Analisis dan arahan penggunaan mengenai fungsi terbina dalam _Cross

Analisis dan arahan penggunaan mengenai fungsi terbina dalam _Cross

Fungsi _Cross dalam bahagian Fungsi Global dokumentasi API digunakan untuk mengira keadaan silang kedua-dua penunjuk.

Pelaksanaan fungsi adalah serupa dengan kod berikut:

Perhatikan bahawa apabilaarr1ditakrifkan sebagai satu susunan penunjuk pantas danarr2sebagai satu susunan penunjuk perlahan, nilai yang dikembalikan oleh_Crossfungsi adalah positif, iaitu, menurut dokumentasi,a positive number is the period of upward penetration, a negative number indicates the period of downward penetration, and 0 means the same as the current price. Ia boleh dilihat, pada masa iniarr1ke atas menembusiarr2telah n kitaran, pada masa ini, ia adalah garis pantas penetrasi ke atas garis perlahan, mewakili crossup. Sama sahaja._Crossfungsi mengembalikan nombor negatif, iaitu, crossdown.

Sebaliknya berlaku jikaarr1ditakrifkan sebagai satu susunan penunjuk perlahan danarr2sebagai satu susunan penunjuk pantas. Nilai positif dikembalikan oleh_Crossfungsi mewakili crossdown. Nilai negatif dikembalikan oleh_CrossFungsi mewakili crossup.

// Return to the number of periods of upward penetration, the positive number is the number of periods of upward penetration, the negative number indicates the number of periods of downward penetration, 0 means the same as the current price
$.Cross = function(arr1, arr2) {            // The number of parameters is 2, it can be seen from the parameter name, these two parameters should be an array type, the array is like an array in the X-axis for the array index value, Y-axis for the index value of the line in the coordinate system, the function is to determine the intersection of the two lines 
    if (arr1.length !== arr2.length) {      // The first step is to determine if the two arrays being compared are equal in length
        throw "array length not equal";     // Throw an error if they are not equal, it is not possible to determine the intersection of unequal lines.
    }
    var n = 0;                              // Declare the variable n to record the intersection state, initially 0, unintersected 
    for (var i = arr1.length-1; i >= 0; i--) {      // Iterate over the array arr1, from the last element forward.
        if (typeof(arr1[i]) !== 'number' || typeof(arr2[i]) !== 'number') { // When any of the arrays arr1 or arr2 is of a non-numeric type (i.e., an invalid indicator), the traversal loop is broken.
            break;                                  // break out of a loop
        }
        if (arr1[i] < arr2[i]) {                    // If arr1 is smaller than arr2 then n--, will record the relative state of arr1, arr2 at the beginning, (i.e., at the beginning n will adjust itself according to the relative sizes of arr1[i], arr2[i], and once there is another relationship between the sizes of arr1[i], arr2[i] opposite to the state of n, i.e., a crossing of the two lines has occurred.)
            if (n > 0) {
                break;
            }
            n--;
        } else if (arr1[i] > arr2[i]) {             // If arr1 is greater than arr2 then n++
            if (n < 0) {
                break;
            }
            n++;
        } else {                                    // arr1[i] == arr2[i], then immediately break
            break;
        }
    }
    return n;                                       // Returns the value of n, which represents the number of periods that have been crossed, and 0, which means that the indicator values are equal.
};

Mari kita simulasi satu set data yang dihantar ke parameter ini dan lihat bagaimana ia menjadi

var arr1 = [1,2,3,4,5,6,8,8,9]     // fast line indicator
var arr2 = [2,3,4,5,6,7,7,7,7]     // slow line indicator
function main(){
    Log("_Cross(arr1, arr2) : ", _Cross(arr1, arr2))
    Log("_Cross(arr2, arr1) : ", _Cross(arr2, arr1))
}

Kita boleh lihat hasilnya ialah 3, -3.

Seperti yang anda lihat dalam carta, silang berlaku di hadapan tiga bar K-garis.