Do you mind if I ask your reasons for going long DRX and and at what price?
A correction is possible in the short term as multiple markets are testing key levels and have got a little extended. However, that doesn't guarantee that it will happen at all or that it will be anything more than a pullback to value if it does. You just need to watch how prices react at these key levels and react accordingly.
I'm a big fan of market breadth and look at a number of charts every week to help gauge market participation. Currently 83% of stocks are above their 50 day moving average, 70% are above their 150 day moving average and 58% are above their 200 day moving average in the entire New York Stock Exchange. All of these figures have been gradually rising since December. So in the short term the market is very near the top of it's range, however, it doesn't mean it can't stay in this range for a while as you can see from the charts below, and continue to move higher as the medium term moving averages show that that they have plenty of room still. But what it does show is that risk is higher in the short term so you need to be cautious imo and have a plan for how you will deal with a correction if it does happen.