when do u enter a trade

hi all

how come many times when i enter a trade, it immediately becomes a support and goes the other direction??? This usually happens when its very choppy. Eg now with AUD/JPY. It must be the 5th time tonight it happened. I entered when i see it build momentum going on a direction, only to see it stop and turn around !!!

When do u see as a signal to enter a trade? What indicators do u use?

THE ONLY TIMES i can safely enter is when a very long and straight trend has exhausted itself, then if i enter when i see it trying to push out of the trend, i will win 90% of time...