//@version=4
study(title="200-100", shorttitle="EMA", overlay=true, resolution="30")
len = input(200, minval=1, title="Length")
src = input(close, title="Source")
offset = input(title="Offset", type=input.integer, defval=0, minval=-500, maxval=500)
out = ema(src, len)
plot(out, title="EMA", color=color.black, offset=offset)

///////study(title="ema2", shorttitle="EMA1", overlay=true, resolution="30")
len1 = input(100, minval=1, title="Length")
src1 = input(close, title="Source")
offset1 = input(title="Offset", type=input.integer, defval=0, minval=-500, maxval=500)
out1 = ema(src1, len1)
plot(out1, title="EMA1", color=color.red, offset=offset1)