4 SMA + 4 EMA + Buy&Sell Cross (EMA or SMA) Strategy [d3nv3r]

//
// @author d3nv3r
// @inspiration [LazyBear]
// List of all my indicators: https://github.com/d3nv3r0ne/tradingview
//
// How to use it :
//  any chart but be careful with dates
//  it's a way to have every EMA/SMA and a Buy and Sell strategy on the same chart
//
//  with the configuration panel :
//      you can use the strategy or not
//      you can chose to use an EMA strategy instead of a SMA strategy
//      you can select lenght of the E/SMA Cross strategy
//      you can select lenght of every 4 SMA + 4 EMA
//      you can chose to show or not any MA
//
//@version=4
strategy(shorttitle = "B/S X + 4 SMA + 4 EMA", title="4 SMA + 4 EMA + Buy&Sell Cross (EMA or SMA) Strategy [d3nv3r]", overlay=true)

//
// Variables inputs
//
useStrategy = input(true, title="Show Buy and Sell Cross strategy")
useEMA = input(false, title="Use EMA Cross strategy")

lengthBS = input(title="Length MA Cross", type=input.integer, defval=140, minval=1)

lengthSMA1 = input(title="Length MA 1", type=input.integer, defval=20, minval=3)
lengthSMA2 = input(title="Length MA 2", type=input.integer, defval=50, minval=5)
lengthSMA3 = input(title="Length MA 3", type=input.integer, defval=100, minval=7)
lengthSMA4 = input(title="Length MA 4", type=input.integer, defval=200, minval=13)

lengthEMA1 = input(title="Length EMA 1", type=input.integer, defval=20, minval=3)
lengthEMA2 = input(title="Length EMA 2", type=input.integer, defval=50, minval=5)
lengthEMA3 = input(title="Length EMA 3", type=input.integer, defval=100, minval=7)
lengthEMA4 = input(title="Length EMA 4", type=input.integer, defval=200, minval=13)

showMA1 = input(true, title="Show MA 1")
showMA2 = input(true, title="Show MA 2")
showMA3 = input(true, title="Show MA 3")
showMA4 = input(true, title="Show MA 4")

showEMA1 = input(true, title="Show EMA 1")
showEMA2 = input(true, title="Show EMA 2")
showEMA3 = input(true, title="Show EMA 3")
showEMA4 = input(true, title="Show EMA 4")

startYear = input(title="start year", type=input.integer, defval=2011, minval=2011)
startMonth = input(title="start month", type=input.integer, defval=01, minval=01, maxval=12)

src = input(close, title="Source")

//
// Variables
// EMA + SMA for B/S strat + 4 SMA + 4 EMA
//
maBS = sma(src, lengthBS)
emaBS = ema(src, lengthBS)

ma1 = sma(src, lengthSMA1)
ma2 = sma(src, lengthSMA2)
ma3 = sma(src, lengthSMA3)
ma4 = sma(src, lengthSMA4)

ema1 = ema(src, lengthEMA1)
ema2 = ema(src, lengthEMA2)
ema3 = ema(src, lengthEMA3)
ema4 = ema(src, lengthEMA4)

//
// Logic Buy/Sell
//
longConditionSMA = crossover(src,maBS)
shortConditionSMA = crossunder(src,maBS)
longConditionEMA = crossover(src,emaBS)
shortConditionEMA = crossunder(src,emaBS)

//  if we use the strategy - default : true
//      if date above startYear - default : 2011
//                    startMonth - default : january
//          if useEMA - default : false
//              do EMA crossunder/crossover strategy
//          else
//              do SMA crossunder/crossover strategy
//      else
//          do nothing
//  else
//      do nothing
if (useStrategy)
    if year > startYear
        if useEMA
            if (longConditionEMA)
                strategy.entry("Long", strategy.long)
            if (shortConditionEMA)
                strategy.entry("short", strategy.short)
        else
            if (longConditionSMA)
                strategy.entry("Long", strategy.long)
            if (shortConditionSMA)
                strategy.entry("short", strategy.short)
    else
        if year == startYear
            if month >= startMonth
                if useEMA
                    if (longConditionEMA)
                        strategy.entry("Long", strategy.long)
                    if (shortConditionEMA)
                        strategy.entry("short", strategy.short)
                else
                    if (longConditionSMA)
                        strategy.entry("Long", strategy.long)
                    if (shortConditionSMA)
                        strategy.entry("short", strategy.short)

//
// Plot X B/S Strategy + 4 SMA + 4 EMA
//

// use of double ternary operator, take your time ;) i didn't find any otherway to do it, it also change the line style na would use default
plot(useStrategy ? useEMA ? emaBS : maBS : na, color=color.blue, linewidth=3, style=useEMA ? plot.style_stepline : na)

plot(showMA1 and ma1 ? ma1 : na, color=color.purple, linewidth=2)
plot(showMA2 and ma2 ? ma2 : na, color=color.green, linewidth=2)
plot(showMA3 and ma3 ? ma3 : na, color=color.orange, linewidth=2)
plot(showMA4 and ma4 ? ma4 : na, color=color.red, linewidth=2)

plot(showEMA1 and ema1 ? ema1 : na, color=color.purple, style=plot.style_stepline, linewidth=2)
plot(showEMA2 and ema2 ? ema2 : na, color=color.green, style=plot.style_stepline, linewidth=2)
plot(showEMA3 and ema3 ? ema3 : na, color=color.orange, style=plot.style_stepline, linewidth=2)
plot(showEMA4 and ema4 ? ema4 : na, color=color.red, style=plot.style_stepline, linewidth=2)

// List of all my indicators: https://github.com/d3nv3r0ne/tradingview
// PEACE !