Divide the fresh cherries between the two glasses and muddle until crushed. (Alternatively, run them through a food processor.) Add ice cubes.
In a cocktail shaker, combine the tequila, triple sec, cherry juice, lime juice, and agave. Taste and adjust. Divide between two glasses. Garnish with additional fresh cherries if desired. Serve and enjoy!
Recipe by Coffee & Quinoa at https://www.coffeeandquinoa.com/2014/07/tart-cherry-margaritas/