length1 = input(8, "T3 Length")
a1 = input(0.7, "Volume Factor")
e1 = ema((high + low + 2 * close) / 4, length1)
e2 = ema(e1, length1)
e3 = ema(e2, length1)
e4 = ema(e3, length1)
e5 = ema(e4, length1)
e6 = ema(e5, length1)
c1 = -a1 * a1 * a1
c2 = 3 * a1 * a1 + 3 * a1 * a1 * a1
c3 = -6 * a1 * a1 - 3 * a1 - 3 * a1 * a1 * a1
c4 = 1 + 3 * a1 + a1 * a1 * a1 + 3 * a1 * a1
T3 = c1 * e6 + c2 * e5 + c3 * e4 + c4 * e3
col1 = T3 > T3[1]
col3 = T3 < T3[1]
color_1 = col1 ? color.green : col3 ? color.red : color.yellow
plot(T3, color=color_1, linewidth=3, title="T3")
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