WMT has traded at a premium for the last 20 years. Not likely to change at this point especially since the company's most recent forecast was that revenue is expected to double in the next 5 years. I would take that forecast with a grain of salt from most companies but WMT has a long history of being conservative in their forecasts.
I should probably note that I don't "trade" stocks. I have owned WMT for 25 years now so I guess I would be classified as a long term investor - lol.