Like K8te said, the open circles indicate that you're not temping at the same time every day - or not at the 'default' time that your settings are saved at. This influences the readings and if you temp orally, your temps might be up-and-down, especially if you're a mouth breather - meaning that your mouth is open while you sleep and thus your temperature will be lower.
At the moment, it doesn't look like you have ovulated yet. The low temperatures you have at the moment could indicate that ovulation is very near so if your temps start going up again, ff might give you your cross-hairs - those are red lines, one vertical and one horizontal to indicate the day that you ovulated as well as your coverline.
When you temp (no matter which method you use), stick to that method the whole time, do not change it at all during the cycle. If you wish to change to vaginal temping (a much more accurate way of temping), wait until your next cycle starts to do so. Also, always keep the thermometer in for five minutes before reading the results.
I hope that this helped some.
Good luck to you and lots of