# Why is Easy Chart Default Pen Aggregation Mode set to Min/Max? **URL:** \ **Category:** Ignition\ **Created:** [April 10, 2018, 5:10pm UTC](https://forum.inductiveautomation.com/t/why-is-easy-chart-default-pen-aggregation-mode-set-to-min-max/17661 "2018-04-10T17:10:00Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dano38291](https://avatars.discourse-cdn.com/v4/letter/d/9d8465/32.png) [@dano38291](https://forum.inductiveautomation.com/u/dano38291)\ **Post date:** [April 10, 2018, 5:10pm UTC](https://forum.inductiveautomation.com/t/why-is-easy-chart-default-pen-aggregation-mode-set-to-min-max/17661/1 "2018-04-10T17:10:00Z")
Hello, Why is the Easy Chart default Pen Aggregation Mode Min/Max? This causes issues when you Export to Excel and it gives you multiple timestamps. I was having the multiple timestamp issue when I would view exported data. I finally found some posts where they said change Aggregation Mode from Min/ Max. I selected Closest Value. **I had the Same Issue in 2018 that someone had in 2010. My question now is why is this Min/Max the Default?** > [@Save to Excel on Easy Chart](http://forum.inductiveautomation.com/t/save-to-excel-on-easy-chart/16538): > > Hi. I keep getting asked by our client why when using Easy chart save to excel data they get 2 values in the excel that have the same times but different values > [@Easy Chart number of records when saving to excel](http://forum.inductiveautomation.com/t/easy-chart-number-of-records-when-saving-to-excel/7842): > > When using Easy Chart save Data for Excel , 30 data points are displayed per second for the same tag. How do I change this? I would like to display 1 data point per tag per minute. The tag is using Historical Scanclass and has a deadband of 0.1. Chart mode is RealTime with a poll rate of 1. I am having another issue that this post above might have the solution for by Setting Tag history mode to Discrete. > [@Easy Chart Datapoints](http://forum.inductiveautomation.com/t/easy-chart-datapoints/5866): > > Ignition 7.5.6 beta 2 I currently have an easy chart set up showing a single integer tag I am logging from a PLC. The tag history for the tag is setup the following way history provider = processdb historical scanclass = default historical ( 1000ms) historical deadband = 0 max time between records = unlimited value mode = discrete timestamp source = system My easy chart is set up the following way chartmode = realtime Realtime range Unit Count = 5 Unit = Minute Tag History resoluti… ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [April 10, 2018, 5:24pm UTC](https://forum.inductiveautomation.com/t/why-is-easy-chart-default-pen-aggregation-mode-set-to-min-max/17661/2 "2018-04-10T17:24:28Z")
If you change a default, even if everyone thinks you have a good reason, you will break the systems of people who are using the default. Don’t break existing user’s systems, or otherwise make it hard to upgrade. Set the aggregation mode for yourself and carry on. ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [April 11, 2018, 2:55pm UTC](https://forum.inductiveautomation.com/t/why-is-easy-chart-default-pen-aggregation-mode-set-to-min-max/17661/3 "2018-04-11T14:55:58Z")
Also, the export functionality built into the chart is not a replacement for a true data export - it’s there to quickly export the visible data on the chart, but too often is used as an actual compliance/quality export, when there are better tools ([`system.tag.queryTagHistory`](https://docs.inductiveautomation.com/display/DOC79/system.tag.queryTagHistory)) available for that purpose.