Upload after ranked match?

Sometimes after a ranked match the game asks me if i want to upload it so everyone will see it in the leaderboard,I was wondering is there a way to choose after a match to upload the replay?
because it seems random :[

you get the option after a 5 game win streak on you or your opponents end. So if you or your oppenent is on a streak you will notice before the game, a red film thing under the character portrait

ill check,thanks for replying!

Its is explained in the instruction manual if you have it