La función _Cross en la columna de funciones globales de la documentación API se utiliza para calcular el estado cruzado de las dos líneas de indicadores
Hay que señalar que cuandoarr1
se define como un conjunto de indicadores de línea rápida, yarr2
se define como una serie de indicadores de línea lenta,
el valor devuelto por el_Cross
función es un número positivo, es decir, de acuerdo con el contexto de la documentacióna positive number is the upswing period, a negative number indicates the downswing period, and 0 means it is the same as the current price
- ¿ Por qué?
se puede ver que en este momento,arr1
ha cruzado hastaarr2
durante n ciclos, es decir, la línea rápida cruzó la línea lenta, lo que indica la cruz dorada.
De la misma manera, si el_Cross
La función devuelve un número negativo, significa cruz de la muerte.
Si ` `arr1is defined as an array of slow line indicators, and
arr2as an array of fast line indicators, the situation will be opposite. If the value returned by the
_Cruzfunction is a positive number, it means death cross. If the value returned by the
La función de cruz es un número negativo, significa cruz dorada.
// Return the number of upswing periods; a positive number represents the number of upswing periods, and a negative number represents the number of downswing periods, and 0 means it is the same as the current price
$.Cross = function(arr1, arr2) { // The number of parameters is 2. As you can see from the parameter names, these two parameters should be of array type.
// The array is like a line segment in the coordinate system where the X axis is the array index value and the Y axis is the index value. The function is to determine the intersection of two lines
if (arr1.length !== arr2.length) { // First, judge whether the lengths of the two compared arrays are equal
throw "array length not equal"; // If they are not equal, raise an error, for the unequal indicator lines cannot judge if crossed or not
}
var n = 0; // Declare the variable n to record the cross-status; its initial value is 0, indicating not crossed
for (var i = arr1.length-1; i >= 0; i--) { // Traverse arr1,from the last element to the front
if (typeof(arr1[i]) !== 'number' || typeof(arr2[i]) !== 'number') { // when arr1 or arr2 is non-numeric type (namely invalid indicators), break the traversing loop
break; // break the loop
}
if (arr1[i] < arr2[i]) { // If arr1 < arr2, the n-- will record the comparative status of arr1 and arr2 from the beginning (that is, at the beginning, n will adjust automatically according to the comparative value of arr1[i] and arr2[i]; once the comparison relation between arr1[i] and arr2[i] opposite to n happens, it means the two lines crossed).
if (n > 0) {
break;
}
n--;
} else if (arr1[i] > arr2[i]) { // If arr1 > arr2, then n++
if (n < 0) {
break;
}
n++;
} else { // arr1[i] == arr2[i], then break immediately
break;
}
}
return n; // Return n, indicating the number of periods with cross, 0 means equal indicator values
};
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))
}
Puedes ver que los resultados son 3 y -3.
La ubicación de la cruz está frente a tres barras de la línea K.