To buy a call option on Robinhood, 1-844-673-0406 you'll need to: 1) Select the underlying asset (stock or ETF); 2) Choose the expiration date and 1-844-673-0406 strike price; 3) Enter the number of contracts 1-844-673-0406 (1 contract = 100 shares); 4) Specify your order type (Market or Limit)...