iShares Nasdaq Biotechnology - Feeling for a Bottom

On Friday, I took a small position in iShares Nasdaq Biotechnology (IBB). If it moves up from here I'll add to the position. If it resumes its downtrend, I'll take a small loss and move on. I've read you're not supposed to try to pick bottoms, but some of my best trades have been doing just that. I feel that as long as good money management is practiced, making a small bet while trying to nail a bottom is worth the risk. Another Biotech ETF that I considered was Biotech HOLDRs Trust Biotech HOLDRs Trust (BBH). Due to the fact that it trades at around 180$ a share and there is a 100 share minimum buy, I didn't want to make quite that large of an initial purchase. The BBH chart looks better than the IBB chart to me, but making a smaller bet makes more sense to me right now, at least until the market gives better indication as to its direction.