One of the things we use to define trends and see changes to trends if any is to see the retracement of price and measure how much it is changing from it's dominant nature.
Thus if the movement is down, measuring the bounces off the lows and seeing them for the magnitude as well as the time taken to effect the change should give you a sharper idea of the change taking place ( if any)
I like to use a PNF chart to do this, as it eliminated noise and measures movement in market time.
Here is a chart of the Nifty spot – 1 point 10 box reversal with retracements measured for the past one month of activity.
The chart shows the biggest bounce off the lows of be 125-136 points.
Today's rise off the lows is a good 87 points.