Well rest all you can find in my thread but the Bold green and red lines which is forming a channel is as under.
Draw High EMA2 and Low Ema2.
And then to smoothen them, plot Keltner channels with 8,0.4 as settings.
Then plot the TEMA2(in Bold Green of the top of the keltner channel of EMA2 High)
and TEMA2 of the bottom of the keltner channel of EMA2 Low. In the end only these 2 TEMA's (bold Green and Bold Red) should be on your charts. Use the No draw function for all the other parameters used.