Gut Check
If you've bought in at the recent top and have had the misfortune of riding the last three days down, you might be getting worried. As it stands right now, my perspective tells me this is nothing more than an overbought correction within the 6-month window. Charts are like people, when they get overextended, they need to take a breather, and gather up their energy for the next move. I try not to predict prices because I know I'll be wrong the majority of the time, so let me tell you what I do know.
The Transports are are within a recent 5 year, 1 year, year-to-date, 6-month, 3-month, 1-month, and 1-week high. The price is always right are your expectations inline with the trend? Within the chart below, we've yet to pull back more than 25% of the high/low range across multiple measurements I use, I consider this to be a healthy chart.

Watch for a reversal in the dollar, and for bonds to provide confirmation for the inverse direction of stocks.
Take care and trade safe...Jason