BBT help?

[Orangio]

Any charting experts about? I'm just curious as to why FF thinks I ovulated on CD19? To me, CD20 looks more likely - there's a bigger temp jump and it's the last day of ewcm.
Is there some other factor which I'm unaware of?
TIA!

Anyone?

Not an expert but I don’t think the size of the jump is the key, just the consistent rise. Also ovulation isn’t something that takes place over an entire day, just a moment, which is why people sometimes take multiple OPKs over the course of a day with different results. How long have you been temping? Is this normal for you? I think we know our bodies better than an app, I’m fairly sure my app was a day out the month I conceived for a few reasons.

I've temped six full cycles, and usually have a clearer temp jump than this, with ewcm finishing on the day of the last low temp before the jump. This slow rise is odd for me, but nothing happened around ovulation to upset my temps so I think they're reliable.
You're right, it doesn't matter to pinpoint the exact day, but I'm just curious to understand more about how FF calculates it 😊