MACD strat

//@version=4
study(title="", shorttitle="",overlay=true)
len = input(14, minval=1, title="DI Length")
lensig = input(14, title="ADX Smoothing", minval=1, maxval=50)

up = change(high)
down = -change(low)
plusDM = na(up) ? na : (up > down and up > 0 ? up : 0)
minusDM = na(down) ? na : (down > up and down > 0 ? down : 0)
trur = rma(tr, len)
plus = fixnan(100 * rma(plusDM, len) / trur)
minus = fixnan(100 * rma(minusDM, len) / trur)
sum = plus + minus
adx = 100 * rma(abs(plus - minus) / (sum == 0 ? 1 : sum), lensig)

//plot(plus, color=color.blue, title="+DI")
//plot(minus, color=color.orange, title="-DI")
//plot(adx, color=color.red, title="ADX")
////////////////////////////////////////////////////////////////////////////
fast_length = input(title="Fast Length", type=input.integer, defval=12)
slow_length = input(title="Slow Length", type=input.integer, defval=26)
src1 = input(title="Source", type=input.source, defval=close)
signal_length = input(title="Signal Smoothing", type=input.integer, minval = 1, maxval = 50, defval = 9)
sma_source = input(title="Simple MA(Oscillator)", type=input.bool, defval=false)
sma_signal = input(title="Simple MA(Signal Line)", type=input.bool, defval=false)

// Plot colors
//col_grow_above = #26A69A
//col_grow_below = #FFCDD2
//col_fall_above = #B2DFDB
//col_fall_below = #EF5350
//col_macd = #0094ff
//col_signal = #ff6a00

// Calculating
fast_ma = sma_source ? sma(src1, fast_length) : ema(src1, fast_length)
slow_ma = sma_source ? sma(src1, slow_length) : ema(src1, slow_length)
macd = fast_ma - slow_ma
signal = sma_signal ? sma(macd, signal_length) : ema(macd, signal_length)
hist = macd - signal

//plot(hist, title="Histogram", style=plot.style_columns, color=(hist>=0 ? (hist[1] < hist ? col_grow_above : col_fall_above) : (hist[1] < hist ? col_grow_below : col_fall_below) ), transp=0 )
//plot(macd, title="MACD", color=col_macd, transp=0)
//plot(signal, title="Signal", color=col_signal, transp=0)
////////////////////////////////////////////////////////////////////////////
// cond1 = (crossover(plus,minus))
// cond2 = (crossover(macd,signal))
// cond3 = (crossunder(plus,minus))
// cond4 = (crossunder(macd,signal))
cond1 = plus > minus
cond2 = macd > signal
cond3 = plus < minus
cond4 = macd < signal
var inLong = false
enterLong = cond1 and cond2 and not inLong
enterShort = cond3 and cond4 and inLong
if enterLong
    inLong := true
else
    if enterShort
        inLong := false

//conditionbuy = cond1 and cond2 or cond1 and not cond2
//conditionsell = cond3 and cond4 or cond3 and not cond4
//plotshape(conditionbuy, text="BUY", style=shape.labelup,color=color.green, textcolor=color.white, location=location.belowbar, transp=0)
//plotshape(conditionsell, text="SELL", style=shape.labeldown,color=color.red, textcolor=color.white, location=location.abovebar, transp=0)

plotshape(cond1, "cond1", shape.circle, location.top, color.silver, text = "1", size = size.small)
plotshape(cond2, "cond2", shape.diamond, location.top, color.orange, text = "2", size = size.tiny)
plotshape(cond3, "cond3", shape.circle, location.bottom, color.fuchsia, text = "3", size = size.small)
plotshape(cond4, "cond4", shape.diamond, location.bottom, color.aqua, text = "4", size = size.tiny)
plotshape(enterLong, "enterLong", shape.triangleup, location.belowbar, color.green, 0, text = "enterLong", size = size.tiny)
plotshape(enterShort, "enterShort", shape.triangledown, location.abovebar, color.maroon, 0, text = "enterShort", size = size.tiny)
// Place these markers one bar late so they don't overprint the "plotshape()" triangles.
//plotchar(cond5[1], "cond5", "⮝", location.belowbar, color.lime, 0, size = size.tiny)
//plotchar(cond6[1], "cond6", "⮟", location.abovebar, color.red, 0, size = size.tiny)