Volume is something few investors follow to any degree, yet it’s probably one of the most valuable technical tools you can use to find big-winning stocks. Simply put, when volume (i.e., shares traded per day) spikes while the stock makes a humongous upmove (or downmove), especially near the start of a move, you should take note. Look at Walter Industries (WLT), above, a leading coal stock of 2008. While most investors just heard of the coal growth story within the past few weeks, the market was telling you something big was happening way back in January. Following WLT’s sharp dip...