Thread: Is there a way to find my REM sleep?

Well this could be useful for me if i knew how my sleep cycles worked.
I know the largest REM sleep starts after 4-6 hours of sleep generally, but i can't
tell which is the most appropriate time to wake up in a middle of a REM sleep for me.
This could be useful to do FILD or WBTB. Generally i put my alarm clock after 4 hours
but i don't feel any difference in my dreams vividness.