How can I automate multiple number values in Shopify Flow conditions?

Topic summary

Goal: Automate coupon emails for customers every 6 subscription fulfillments without manually updating Shopify Flow condition values (6, 12, 18, …).

Setup: The subscription fulfillment count is stored in customer metafields (custom fields attached to a customer). Flow checks this metafield number whenever subscription orders occur; weekly subscriptions can reach high counts quickly.

Constraint: Shopify Flow does not support using code (e.g., Liquid, Shopify’s templating language) within conditions. You cannot dynamically evaluate “is multiple of 6” in a condition and must hard-code explicit values (6, 12, 18, 24, etc.).

Status: No workaround or automation for multiples in Flow conditions was provided. The question remains unresolved given current platform limitations; action is to continue hard-coding values or await future feature support.

Summarized with AI on February 6. AI used: gpt-5.

Hi Paul, appreciate your response. we’ve made customizations so that the number of subscription will be counted in the customer metafields when subscription products are fulfilled.
So in the flow, we made the condition to check the metafields value number when subscription orders were made. Some subscription menus are weekly, so it’s fairly easy to reach a high number.
I was wishing to place a liquid code in the value to automatically count the multiple number, so I can avoid adding the value number in the flow every time, such as 6, 12, 18, 24, ….