A 1 PIP move?

Lets say that the computer chart moves the price from 1,5000 to 1,5001-a one pip move.Why?I could understand if the price would move once a day but every second or so?A one pip move has to mean something,there is a reason why it moved for only one pip.Whats that reason?

Well with several trillion dollars worth of instruments traded a day, and a pip being worth 1/100 of a penny in many cases, the answer is rather obvious.

It moves so easily since all the buying or selling demand has been satisfied at that price level so it moves one way or the other until all open orders are satisfied. The thinner the market (like EUR/AUD vs EUR/USD) the more quick and violent the moves can be.

The answer is not obvious,at least not to me-please explaine

Oh but it's just noise, price does not move 1 pip for any specific reason

Moon's gravitation field! Hmm, noise...i like noise

What tdion meant was, in the real world of forex, a lot of money were transferred (sold or bought) a lot of times everyday by banks, investment firms, retail investors (tha's us). and like stocks, if the demand for a certain currency is high, it's value increase, cos buyers will bid higher to get their orders filled. in other words, supply and demand cause price movement.

This is probably confusing at first cos your views on forex is still fixated on the rates given by money changers at banks or the stall around the corner. such rates are fixed by the operators of the outlet on a per day basis. They need this to be fixed for the day else they can't run their business properly.

If price moves from 1.4000 to 1.4001 that means that at 1.4001 is the price where there are just as many buyers as sellers.
If there isn't anyone to make a buy and sell deal at 1.4001 prices moves up or down untill both sides are satisfied.