In a large bowl, combine corn, olives, all the peppers and onion.
In a small bowl, whisk together olive oil, lemon juice, vinegar, oregano, salt and pepper. Pour over corn mixture and toss to coat. Cover and refrigerate overnight.
Just before serving, chop avocados and stir into salsa. Serve with tortilla chips.
Notes
The key to this avocado salsa is letting this salsa soak up in all the flavors overnight. So make sure to plan ahead because this salsa needs to sit in the fridge for at least 8 hours. Trust me, it will be worth the wait!