15th of the month for BTC

As you y'all can see, bitcoin goes to lowest price at the middle of the month. In my opinion, it will back to 5k. If we calculate the 15th day of prices:

2017.07.15 = 1832
2017.09.15 = 2971
2017.11.15 = 4818

1832/2971 = 0.6166, 2971/0.6166 = 4818

I felt like price of BTC will go down to 5k and will moon soon...