In OvuFriend, ovulation may be marked on your chart with a continuous or a dotted line.
If ovulation is marked with a continuous line, it means that there is a very high probability of the occurrence of ovulation, because it has been confirmed by a sufficient number of fertility indicators. For example, apart from an increase in basal body temperature, fertile mucus was also present in the days around ovulation.
If ovulation is marked with a dotted line, it means that ovulation is tentative, because there aren't enough confirmed indicators, nor has any other factor distorted its interpretation. For example, despite noting an increase in body basal temperature, the cervix has been in an infertile position, or your ovulation test results are negative. In such a case, OvuFriend might suspect that ovulation has taken place, but cannot tell you for sure.