//@version=4
study(title="VISHNU SIGNAL", overlay=true)

LengthSEMA = input(title="SEMA Length", defval=9)
LengthLEMA = input(title="LEMA Length", defval=21)
LengthSlow50MA=input(title="50 MA Length", defval=50)
Length34EMA=input(title="34 MA Length", defval=34)
Length50EMA=input(title="50 MA Length", defval=50)

SEMA = ema(close, LengthSEMA)
LEMA = ema(close, LengthLEMA)
Slow50MA = sma(close,LengthSlow50MA)
slow34ema=ema(close, Length34EMA)
slow50ema=ema(close, Length50EMA)
//buy = crossover(SEMA, LEMA ) and close > Slow50MA
// MACD

//buy = crossover(SEMA, LEMA ) and close > Slow50MA and histLine >0.1
buy = crossover(SEMA, LEMA ) and close > Slow50MA and close >slow50ema

if buy
    alert("BUY alert on" + timeframe.period)

sell=crossover(LEMA, SEMA ) and close < Slow50MA and close < slow50ema

if sell
    alert("SELL alert on" + timeframe.period)
////plot(MA, color=color.new(color.green, 0), title=MA)
//plot(EMA, color=color.new(color.red, 0), title=EMA)

//emadiff = LengthLEMA - slow34ema

cross = crossover(SEMA, LEMA ) or crossover(LEMA, SEMA )

if cross
    alert("CROSS alert on" + timeframe.period)

plotshape(cross, style=shape.labeldown, location=location.abovebar, color=color.rgb(106, 76, 175), size=size.tiny, title="Cross", text="C", textcolor=color.white)

plotshape(buy, style=shape.labelup, location=location.bottom, color=color.green, size=size.tiny, title="Buy", text="B", textcolor=color.white)
plotshape(sell, style=shape.labeldown, location=location.top, color=color.red, size=size.tiny, title="Sell", text="SELL", textcolor=color.white)