With the bitcoin Halving Day quickly approaching I received a quite a few emails from people asking where to find market data and a few asking for where to buy some bitcoins. I am not going to go into the purchase of bitcoins at the moment, perhaps I will go into that at a later date (to tell the truth, I have never bought bitcoins, I mine them).
I will however give you a quick primer on where I go for exchange market data.
First off, there are A LOT of exchanges. Just look at as the Exchanges page over at the bitcoin wiki. I have not even visited most of them and I have only actually used two them (perhaps one day I will find the time to explore more).
The source I use most and get my data feed from (and is reputed to be largest) is Mt.Gox. If you visit their home page you will see a dark grey strip along the top of the page that has current live spot prices at the Mt.Gox Exchange, even better though if you click on the strip a very nice candlestick chart will drop down.
With the Mt.Gox chart up (or down depending on your point of view) you will see a few buttons that allow you to zoom to Day, Week and Month data. You will also see a link to Mt.Gox Live, a rather creative way of charting market data.
A word of caution: I am not affiliated with Mt.Gox and neither recommend or recommend against using Mt.Gox for financial transactions, I do however recommend looking at their market data.