Relationship between the S and A indexes for each individual star. With the magenta circles, we show the detected flares for each star. With the green dashed line, we show the best fit line to the data without considering the flares. For those stars where the indexes correlate to a value of ρ ≥ 0.5, we show the confidence level of 95%. With red boxes we highlight those stars whose correlation coefficient is greater than 0.7.