Forex is big online game with live players. (FX GAME)

Players (traders) use lots of different playing (trading) styles.
So we can categorize them by: trading systems, time period they like to trade and their accounts sizes.

-Trading systems like: TREND TRADING, SESSION TRADING, NEWS TRADING, GAP TRADING, TAPE READING, etc.

-Time periods: SCALPERS, INTRADAY traders, SHORT THERM traders and LONG THERM investors.

-Account sizes: Small account size, medium account size, large account size (BIG DOGS).

MARKET has PRICE DEVIATION and PRICE OSCILLATION.

-Market price move of 1%-2% is called OSCILLATION.
-DEVIATION is price anomaly and it moves round 0.1%-0.2%.

-If you trade FOREX then you know that FOREX broker allows
LEVERAGE high as 1:100. This is realy high leverage and if you use all of this leverage on one position you will loose your money instantly.

Scalpers are trading market DEVIATION and they use high leverage.