1. What parameters do you use to classify a whipsaw day?
I don't use any parameters. I assume that every day will be choppy, whipsaw day. If I'm proven wrong then I take a loss.
2. How do you differentiate between a reversal and a retracement? The way I see it, a reversal on a shorter time frame could be a retracement on a longer time frame.
I don't differentiate at all. I adjust my positions to create an appropriate synthetic construct that will produce profit either when the price backs up or when it doesn't move at all. Like one of the ET members said : "Boring, but effective"