在 TradingView 中打开 on/off 个 SMA

Question

我有以下代码：

//@version=4
// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Coded by dUdU

strategy("My Strategy", overlay=true, default_qty_type=strategy.percent_of_equity, default_qty_value=100, initial_capital=15000, process_orders_on_close=true)

// Settings

candleLookback = input(5, minval=1)
atrExitMultiplier = input(0.0, step=0.1)
slowSMA = input(90, minval=0)
fastSMA = input(10, minval=1)

sSMA= sma(close, slowSMA)
fSMA= sma(close, fastSMA)

// Calculation

inMarket = strategy.opentrades != 0
opened = strategy.opentrades[0] > strategy.opentrades[1]

// Range check

FromDay    = input(defval = 1, title = "From Day", minval = 1, maxval = 31)
FromMonth  = input(defval = 10, title = "From Month", minval = 1, maxval = 12)
FromYear   = input(defval = 2020, title = "From Year", minval = 1990)
ToDay      = input(defval = 1, title = "To Day", minval = 1, maxval = 31)
ToMonth    = input(defval = 1, title = "To Month", minval = 1, maxval = 12)
ToYear     = input(defval = 2021, title = "To Year", minval = 1990)
Start     = timestamp(FromYear, FromMonth, FromDay, 00, 00)
Finish    = timestamp(ToYear, ToMonth, ToDay, 23, 59)
Timerange() =>
    time >= Start and time <= Finish ? true : false

// Entry order

longCondition = close > fSMA and close > sSMA
    
if longCondition
    strategy.entry("Long", true, comment="Entry",when=Timerange())
        
// Exit order
    
exitPrice = highest(candleLookback) + atr(candleLookback) * atrExitMultiplier
plot(longCondition or inMarket ? exitPrice : na, "Exit Price", color.white, style=plot.style_linebr, offset=1)
strategy.exit("Long", limit=exitPrice, comment="Exit")
    
plot(sSMA,"slow",#FFFFFF)
plot(fSMA,"fast",#EB4034)

我希望能够将数字“0”放入 slowSMA 中，这样我就可以禁用它并只使用 fastSMA。但是，当我输入“0”时出现错误！

我试过这样放置 'if'：

...
if slowSMA == 0
    longCondition = close > fSMA
else
    longCondition = close > fSMA and close > sSMA
...

没有成功！谁有其他解决方案？

PS.: 解释算法的操作：当价格收于慢速 SMA 和快速 SMA 上方时买入，并在最后 5 根蜡烛的最大值处卖出，并可能关闭慢速 SMA 并且只使用一个 SMA。

Answer 1

我在顶部添加了一个使用 slowMA 的输入：

useSlow = input(title="Use Slow MA", type=input.bool, defval = false)

然后将 longcondition 语句更改为：

// Entry order
longCondition = iff(useSlow, close > fSMA and close > sSMA, close > fSMA)
if longCondition
    strategy.entry("Long", true, comment="Entry",when=Timerange())

如果我理解你的问题，我想这就是你要找的。或者使用简单的 if 或三元设置值。

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