You are correct. TA's rally is running out of steam, and I will not be surprised to see the share price dipping below $7 soon. Lots of boys are starting to short the shares, and the results will be obvious very soon within days. If you have made some money, you should preserve your gains by selling now and re-purchasing the shares back when it goes below $6. Just My Humble Opinion.
You have to be very brave to short at pe of 6. I expect there will be more good news for the trucking industry coming shortly. Just now Knight issued positive results. I cannot predict the future, but anyone that shorts at this level is crazy.