Idunno, kinda the same thing. I don't know about "straight" up/down, but.... if it's going to go up, you wanna correctly buy, right? and vice versa.
No,no.
This is very important issue that many people ignore.
Do you set a stop? If you don't, then even you have 90% win rate, you could lose money because the 10% you lose could cost your entire account.
If you set stop, then those trades which go down before they go up have good chance hitting your stop and you are out even they go up later.