Have you heard about tower line?

It's something about two close price reverse.
It draw within bar.
Rule is within previous bar but higher than previous second bar.(In upmove)
Or within previous bar but lower than second previous bar.(In downtrend)
The within move is all flat.

All within bar's price is same when price first stop move.
Chart looks like this.
The interesting thing is that when price break the within move or just reverse.
It draw two colow on one candlestick line.(It's exactly two small candle body together)

i.imgur.com/zHxLtKQ.png
This chart is just similar. Not very correct.
And I don't know where this "tower chart" come from.
Such a mysterious thing.