Best SAR MT5

How to open buy or sell signals ?
Open buy trade by first blue dot and open sell trade by first red dot

Where is correct stop loss ?
The safe stop loss can be on first dot, (in buy case on first blue dot and in sell case on first red dot)

Where is the correct take profit ?
Take profit can adjust based on Stop loss distance and RR, so my suggest is 2 RR, 2 times greater than stop loss

Where is the exit point if we are in profit but still didn't achieve tp ?
The first exit alert can be cross over between dots and price chart.

When this indicator release alert ?
as soon as new dot appear in new direction , indicator will release alert