I'm looking to buy a flight for Feb 16th to Ft Lauderdale, here are the prices for Saturday flights.?

Question

If it is always best to purchase as far in advance as possible, WHY are the January prices cheaper than most Feb and March prices?
Will they open another Feb flight?
12/8 $351
12/15 84
12/22 251
12/29 97
01/05 251
01/12 97
01/19 97
01/26 97
02/02 97
02/09 97
02/16 131
02/23 131
03/01 131
03/08 131
03/15 186
03/22 186
03/29 131
04/05 131
04/12 97
04/19 131

Answer 1

because Jan is slowest business month of the year, and if advance reservation is still slow next month, you will see lower Feb fare too.