Are earnings dates important for me to consider in my trading?

Earnings dates are important to consider because stocks can have abnormal price movement leading up to and after earnings are reported.

Do all stocks have earnings?

Yes, all publicly-traded companies report earnings.

Do ETF's report earnings?

No, ETF's, or Exchange Traded Funds, are a basket of individual stocks and therefore do not report earnings.

Can I put a negative number in the days until earnings to get days since earnings?

Yes.

Are earnings always reported on a quarterly basis?

Yes, typically. Though exceptions do occur occasionally.

Can this criteria be used for entries and exits?

Yes.