Selfmade Fibonacci Trendlines

study("Fibonacci Trendlines", overlay=true)
plot(ema(close, 8), color=#20C2C5, linewidth=3, title='8 Day EMA')
plot(ema(close, 13), color=#c154de, linewidth=3, title='13 Day EMA')
plot(ema(close, 21), color=orange, linewidth=3, title="21 Day EMA")
plot(ema(close, 55), color=yellow, linewidth=3, title="55 Day EMA")