13/20 EMA Crossover + Trend Check

//version=5
indicator("13/20 EMA Crossover + Trend Check", overlay=true)

ema13 = ta.ema(close, 13)
ema20 = ta.ema(close, 20)
ema100 = ta.ema(close, 100)

plot(ema13, color=color.green, title="EMA 13")
plot(ema20, color=color.orange, title="EMA 20")
plot(ema100, color=color.blue, title="EMA 100")

crossover = ta.crossover(ema13, ema20) and ema13 > ema20 and ema20 > ema100

bgcolor(crossover ? color.new(color.green, 80) : na, title="Buy Signal Background")