EMA21 55 Crossover Alert

//@version=1

study(title="EMA21/55CrossoverAlert", overlay=true)

// Input options

EMA_21 = input(title="EMA 21", type=integer, defval=21)

EMA_55 = input(title="EMA 55", type=integer, defval=55)

// Calculate values

Alert_EMA_21 = ema(close, EMA_21)

Alert_EMA_55 = ema(close, EMA_55)

// Create Buy/Sell Arrows

// plotshape(Buy, color=green, style=shape.arrowup, text="Buy", location=location.bottom)

// plotshape(Sell, color=red, style=shape.arrowdown, text="Sell", location=location.top)

// Show on Chart

plot(Alert_EMA_21, color = white, linewidth=3)

plot(Alert_EMA_55, color = lime, linewidth=3)

// Create alert conditions

alertcondition(condition=crossover(Alert_EMA_21, Alert_EMA_55),

     title="EMA 21 Cross Above",

     message="EMA 21 crossed over EMA 55."

     )

alertcondition(condition=crossunder(Alert_EMA_21, Alert_EMA_55),

     title="EMA 55 Cross Above",

     message="EMA 55 crossed over EMA 21."

     )

// EMA trend bar color

TrendingUp() => Alert_EMA_21 > Alert_EMA_55

TrendingDown() => Alert_EMA_21 < Alert_EMA_55

barcolor(TrendingUp() ? green : TrendingDown() ? red : blue)

// EMA cross background color alert to chart (Tall Candle)

Uptrend() => TrendingUp() and TrendingDown()[1]

Downtrend() => TrendingDown() and TrendingUp()[1]

bgcolor(Uptrend() ? green : Downtrend() ? red : na,transp=50)

// Buy and sell alert (Arrow bottom of Chart, using variables from above)

Buy = Uptrend() and close > close[1]

Sell = Downtrend() and close < close[1]

plotshape(Buy, color=white, style=shape.triangleup, text="Buy", location=location.bottom)

plotshape(Sell, color=white, style=shape.triangledown, text="Sell", location=location.bottom)