when do you ovulate after getting a peak fertility reading?

Hi I am using your digital ovulation predictor and I received peak fertility today ..what are my chances of getting pregnant if I had sex two days before peak fertility? As well as what are my chances of getting pregnantif I have sex the day the predictor shows peak fertility?

Also the directions state that I should stop testing for ovulation after I get one day of peak fertility..if I were to keep to testing what would happen on the third day? What would the ovulation predictor kit show?