This have been debated before leh.. Truthfully, its based on RNG.. But punters being punters will argue that there's a way to see if the machine is tight anot.
For me I usually put in 300RM to 700RM to test a machine. No FG, run. Have FG - does it pay within 2 FG? If not, run.
But my tactic isn't working well on me recently. Alot people takeover my machine and managed to get a good win either via FG or via Jackpot shortly when I leave.
No definite way to find out whether a machine is in paying streak else casinos will be shutting their doors sooner or later.
300RM to 700RM.
What is your bet amount?