mrphr 

I do not know how many people, and how to quantify it, but yes some of them does. They use big time frames, but they will find entries and better prices on intraday time frames, and this can be time frames less than 1h...

Spot market is mostly traded on 4Hr chart. you cannot have a 20 tick stop in forex spot. it's just not worth it.

aleast all people i know who make money use 4hrs+ time frame.

-Lawrence

5 minutes charts for daily trading ..

I would say a good rule of thumb is that the higher the time frame, the more institutions are using that time frame. obviously specific stats are just guesses as these firms are probably not going to reveal any part of there systems. I would venture to say weekly and daily probably have the highest amount of institutional participation. If they are working intraday its for a specific reason, for example algorithmic trading, hedging other positions, or filling clients orders.

5 m TF I think it's because if the position is wrong in the 5 minutes it can be adjusted (reavegered)... Experts = interbank dealers