Positive OPK?

Veronica • I`m 27 & happily married since July 2014. Baby #1 born August 31, 2016.
Started off using clear blue digital OPKs and am kinda on the edge of giving up testing or not. Yesterday I got the blank O on the digital and not wanting to spend the money on more digitals, I bought the equate brand at Walmart. Would you consider this a positive?