2,439,600 shares daily, using the I.B.D. 50 day MA.
"I am not up on this stock but bought it based on what IBD said".
O'Neil himself would caution you about making such investment decisions just on the paper's say-so.
Always look for the "buy point" before jumping in, hoping-upon hopes that you've caught it correctly. Looking at the chart, I'd say you're probably safe here, considering that you've said where you bought ARUN yesterday.
Still, I'd like to see ARUN go lower from here. Why? Look for my recent post in this thread...