system
A chat on subreddit /r/wallstreetbets
human
There is typically a per-contract fee + minimum, so a 100 contract trade would cost you a heck of a lot more than $5.  Typically somewhere in the range of $50 to $80 just to open the trade. 
  
 &amp;#x200B; 
  
 Do you actually have some magical broker that charges you single digit fees on trades with lots of contracts?  If so I'd love to know.  The slippage doesn't outweigh savings on fees at this point.

gpt
Try think or swim/TD. Obviously options/futures are on a per contract basis though