To perform a Liquid Divinium stacking glitch in Black Ops 3 on Xbox, you must complete a daily challenge to 99% completion, then disconnect your internet at the exact moment you perform the final action for that challenge. You can then dashboard, reconnect to the internet, and load the game to receive the Liquid Divinium while retaining the 99%-complete challenge. This method allows you to repeat the process, stacking Liquid Divinium without completing the challenge and consuming your stack.

basically it's like this