Why should I use parabolic SAR?

This marker not only predicts market swings but also continuations. While continuations show a steady momentum, reversals signify bullish to bear changes and vice versa, therefore, letting you time your long and short positions.
Rather than complex bands and clouds, it sends signals using dots. A rising slanted pattern underneath the price indicates an uptrend while a dropping slope above the price announces a downtrend. It’s derived as follows:
For ascents:  Former SAR + Former AF (Former EP - Former PSAR)
For descents: Former SAR - Former AF (Former SAR - Former EP)
The EP marks the ascent’s highest high and the descent’s lowest low. Conversely, the AF denotes a 0.02 constant and rises by 0.02 whenever another EP occurs reaching a 0.20 limit. The formula also utilizes the preceding SAR.
This method is inefficient for sideways price actions. Because of the absence of a trend, the signal paces around the price mark, hence, providing misleading alerts.