计算上轨下轨中轨

study("51bitquant_sma", shorttitle="sma", overlay=true)

sma_period = input(defval=30, title="sma_period", minval=10, type=input.integer)

dev_percent = input(defval=0.05, title="dev_percent", minval=0.001, type=input.float)

sma_value = sma(close, sma_period)

sma_up = sma_value * (1 + dev_percent)
sma_down = sma_value * (1 - dev_percent)

plot(sma_up, color=color.green, linewidth=3)
plot(sma_value, color=color.red, linewidth=3)
plot(sma_down, color=color.green, linewidth=3)

 

比较长短周期和sma_sma的比较。
金叉：短周期均线上穿长周期均线
死叉：短周期均线下穿长周期均线

//@version=4
study("51bitquant_sma", shorttitle="sma", overlay=true)

// short_period= input(defval=30, title="sma_period", minval=10, type=input.integer)
long_period= input(defval=50, title="sma_period", minval=20, type=input.integer)

sma_long_period = input(defval=10, title="sma_long_period", minval=5, type=input.integer)

// short_sma_value = sma(close, short_period)
long_sma_vlaue = sma(close, long_period)
sma_long_sma_value = sma(long_sma_vlaue, sma_long_period)


plot(long_sma_vlaue, color=color.red, linewidth=3)
plot(sma_long_sma_value, color=color.green, linewidth=3)