# Sliding window max/min

**URL:** <https://forum.kx.com/t/sliding-window-max-min/9912>\
**Category:** Community Support\
**Tags:** kdb-and-q\
**Created:** [June 1, 2015, 12:06pm UTC](https://forum.kx.com/t/sliding-window-max-min/9912 "2015-06-01T12:06:00Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![varun\_umich](https://avatars.discourse-cdn.com/v4/letter/v/e5b9ba/32.png) [@varun\_umich](https://forum.kx.com/u/varun_umich)\
**Post date:** [June 1, 2015, 12:06pm UTC](https://forum.kx.com/t/sliding-window-max-min/9912/1 "2015-06-01T12:06:00Z")

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I would like to keep track of the max and min of the past 100 ticks. How would I do that?

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**Author:** ![charlie1](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@charlie1](https://forum.kx.com/u/charlie1)\
**Post date:** [June 1, 2015, 12:31pm UTC](https://forum.kx.com/t/sliding-window-max-min/9912/2 "2015-06-01T12:31:00Z")

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http://code.kx.com/wiki/Reference/mmax  
http://code.kx.com/wiki/Reference/mmin

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**Author:** ![LamHinYan](https://avatars.discourse-cdn.com/v4/letter/l/35a633/32.png) [@LamHinYan](https://forum.kx.com/u/LamHinYan)\
**Post date:** [June 1, 2015, 1:34pm UTC](https://forum.kx.com/t/sliding-window-max-min/9912/3 "2015-06-01T13:34:00Z")

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how can i perform moving window calculations (mmax, mmin, mavg) across partition boundaries?

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**Author:** ![pressjonny0](https://avatars.discourse-cdn.com/v4/letter/p/ccd318/32.png) [@pressjonny0](https://forum.kx.com/u/pressjonny0)\
**Post date:** [June 5, 2015, 9:19am UTC](https://forum.kx.com/t/sliding-window-max-min/9912/4 "2015-06-05T09:19:00Z")

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You can’t directly - you have to read into memory first.&nbsp;

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