how to work out probabilities ?

I have a series of events (A:A) that contains events happening singly ( event "1" as single x 199 (F5) and event "-1" as single x 225(J5)) and events happening in rows ( event "1" happening twice in row x 91 (F6) and event "-1" happening twice in row x 84 (J6)) and so on as shown in F5:F14 and J5:J14.

How to calculate probabilities of happening for those events? In other words, what are the chances that after event "1" I will have another event "1"....

I would be very grateful for any help.