//nk
study(title="tvh2", shorttitle="TFH2", overlay=true)
emaplot = input (true, title="Show EMA on chart")
len = input(8, minval=1, title="ema Length")
src = close
out = ema(src, len)
up = out > out[1]
down = out < out[1]
mycolor = up ? green : down ? red : blue
plot(out and emaplot ? out :na, title="EMA", color=mycolor, linewidth=3)


smaplot = input (false, title="Show SMA on chart")
len2 = input(8, minval=1, title="sma Length")
src2 = close
out2 = sma(src2, len2)
up2 = out2 > out2[1]
down2 = out2 < out2[1]
mycolor2 = up2 ? green : down2 ? red : blue
plot(out2 and smaplot ? out2 :na , title="SMA", color=mycolor2, linewidth=1)