Trend-reversal system for Amibroker (AFL)

This technique is primarily based on the theory of trend-reversal. What is this trend
reversal?
We know that after a steep rise in price that must reverse and come down. And also
after a steep fall in price that must reverse and go upward. This phenomena of price
movement occurs everyday in Intraday charts. This theory is called Trend-reversal.
Suppose a price chart is moving in upward direction, so you have to find out the point
after which the price should reverse and start to move downward.
Suppose a price chart is moving in downward direction, so you have to find out the
point after which the price should reverse and start to move upward.