Rickey

For PnF scans on stocks check out stockcharts.com. Not sure if the free access allows PnF scans or not, but the $25/month does.

A good analogy for box size is time frame. For intraday trading you may use a 5 or 15 minute time frame to take advantage of smaller moves. For swing or position trades and longer term analysis you may use daily or weekly time frames. Same with box size. The smaller the box size, the smaller the signals and projected targets will be. The bigger the box size is the bigger the signals and projected target will be. With small time frames you get more noise, same with small box sizes.

Ag reports United States Department of Agriculture - Agency Reports

Some of the bigger players in the FX market include multinational corporations and investment institutions. Say IBM wants to do business in Europe. They will need to make transactions in Euros. When they want to put those profits on the books they will need to exchange those Euros for dollars. Now they may only make that exchange a couple of times a year. So in the mean time they may hedge that exposure so they are not losing money to a depreciating exchange rate. This hedging will cause an imbalance in the supply/demand of the two currencies causing the market to adjust. Investment institutions that buy bonds, for example, from another country will need to use the FX market to exchange their local currency for the currency of the country they are buying those bonds from. The capital inflow causes a supply/demand imbalance in the money supply of the two currencies causing one to rise vs the other. Take last years bear market in the Euro as an example of investment institutions selling there European bonds (among other assets) because of the uncertainty of the Eurozones ability to repay their debt. They sold those assets in a local market receiving the local currency (Euros) in exchange. They then needed to exchange those Euros for their local currencies, say dollars for US institutions. These are just to simplistic causes of exchange rate changes in a the complex FX market.