WMT Walmart Distribution Sell Signal

Walmart is a strong stock that has painted fresh ATH's in the past couple weeks. However, this recent price action has shown considerable weakness: lowered volume, bearish RSI divergences, and an inability to strongly breakout much higher. It seems to be sputtering and in danger of turning over in a rounded top fashion. Candlesticks and wicks on the daily, weekly, and monthly bars look like we're at a top.