Are CDC App Reccurring Buys Being Gamed?

I've been using CDC's recurring buy option for several coins on a daily basis for a while now. Keep in mind that I cannot set the time of the purchase, only the days. The times vary by a couple of minutes but are within five minutes at the beginning of each new day.

What I've noticed is that the different coin prices spike temporarily before my automatic purchases go through, and then the price drops again afterwards.

This seems to me like it's either a fluke and I'm wrong, or people have found a flaw in CDC's system by not allowing specifically timed trades, so now bots are gaming the system.