# Data interchange between two Tracker programs

**URL:** <https://community.dhis2.org/t/data-interchange-between-two-tracker-programs/42538>\
**Category:** Support - Assistance technique\
**Created:** [21 April 2021 15:12 UTC](https://community.dhis2.org/t/data-interchange-between-two-tracker-programs/42538 "2021-04-21T15:12:46Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Mahmud](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/mahmud/32/30730_2.png) [@Mahmud](https://community.dhis2.org/u/Mahmud)\
**Post date:** [21 April 2021 15:12 UTC](https://community.dhis2.org/t/data-interchange-between-two-tracker-programs/42538/1 "2021-04-21T15:12:46Z")

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We have 2 tracker programs setup. When a specific element value is updated in one program’s tracked entity - we want to update an ‘attribute’ of another tracker entity. Is it possible in DHIS2 or we have to do a custom app?

Let me give an example - say in the ART tracker, if one entity’s viral load is above a certain threshhold, we want to update another program where we have only the ‘critical’ entities listed.

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**Author:** ![Mahmud](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/mahmud/32/30730_2.png) [@Mahmud](https://community.dhis2.org/u/Mahmud)\
**Post date:** [30 June 2021 11:35 UTC](https://community.dhis2.org/t/data-interchange-between-two-tracker-programs/42538/2 "2021-06-30T11:35:43Z")

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@austin @Gassim @debora anyone to answer the above question?

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**Author:** ![austin](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/austin/32/41768_2.png) [@austin](https://community.dhis2.org/u/austin)\
**Post date:** [30 June 2021 18:15 UTC](https://community.dhis2.org/t/data-interchange-between-two-tracker-programs/42538/3 "2021-06-30T18:15:10Z")

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@Mahmud this is an interesting use-case! - I believe it will require a custom integration outside of DHIS2 core but @Markus @bobj @morten @chathura should be able to answer in more detail

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**Author:** ![Gassim](https://dhis2.b-cdn.net/user_avatar/community.dhis2.org/gassim/32/35347_2.png) [@Gassim](https://community.dhis2.org/u/Gassim)\
**Post date:** [30 June 2021 18:34 UTC](https://community.dhis2.org/t/data-interchange-between-two-tracker-programs/42538/4 "2021-06-30T18:34:48Z")

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Tracker questions are diverse so we’ve created several tracker groups to answer the different kind of questions. I think this could be a question for the [@tracker-products](https://community.dhis2.org/groups/tracker-products) group.