Six Month Charts of the Sector Spiders and the IYT. If I was trading one of these the way I trade I would be looking for overbought situations to short and oversold one to buy. I would prefer to buy the sector that swings the greatest percentages. Not necessarily the strongest or weakest sector at all. I look at swing trades that run counter the overall trend when I think the sector is about to top or bottom. In between trade the trend which is easier to see on longer term charts: