```
// 计算K值
function K(high, low, close) {
var x = (high + low) / 2;
var y = (high + close) / 2;
var z = (low + close) / 2;
return (x - y) / (y - z);
}
// 计算D值
function D(K, E) {
return 3 K - 2 E;
}
// 计算J值
function J(K, D, E) {
return K E + D;
}
// 计算交叉信号
function crossSignal(K, D, signalLine) {
if (K > signalLine && K > D) {
return (high, low, close) {
var K = K(high, low, close);
var D = D(K, E(high, low, close));
var J = J(K, D, E(high, low, close));
var signalLine = E(high, low, close) 2;
var buySignal = crossSignal(K, D, signalLine);
var sellSignal = crossSignal(K, D, signalLine);
console.log( + signalLine);
console.log(
KDJ指标是一种常用的技术分析工具，它可以帮助投资者判断股票的买卖时机。下面是一份KDJ指标的源码，供大家参考：
```pyho
# KDJ指标公式源码
# 计算RSV值
def RSV(close, ):
low = mi(close, )
high = max(close, )
rsv = (close - low) / (high - low) 100
reur rsv
# 计算K值
def K(rsv, 1, 2):
k = (rsv + 1 + 2) / 3
reur k
# 计算D值
def D(k, ):
d = k - ( - 1) / 2 (k - k[ - 1])
reur d
# 计算J值
def J(k, d, 1, 2):
j = 3 k - 2 d + 2 / 1 (d - k)
reur j
# 获取股票数据并计算KDJ指标值
def ge_kdj(sock_daa, 1=9, 2=3, =14):
close_daa = sock_daa['close']
low_daa = sock_daa['low']
high_daa = sock_daa['high']
rsv_daa = []
k_daa = []
d_daa = []
j_daa = []
for i i rage(le(close_daa)):
if i u003c :
rsv = RSV(close_daa[i], )
k = K(rsv, 1, 2)
d = D(k, )
j = J(k, d, 1, 2)
else:
rsv = RSV(close_daa[i], 14)
k = K(rsv, 1, 2)
d = D(k, 14)
j = J(k, d, 1, 2)
rsv_daa.apped(rsv)
k_daa.apped(k)
d_daa.apped(d)
j_daa.apped(j)
reur rsv_daa, k_daa, d_daa, j_daa
```