# Keep after worst case slippage mistake

**URL:** https://forums.collective2.com/t/keep-after-worst-case-slippage-mistake/5200
**Category:** C2
**Created:** [January 29, 2010, 4:40pm UTC](https://forums.collective2.com/t/keep-after-worst-case-slippage-mistake/5200 "2010-01-29T16:40:28Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![PanagiotisKostopou](https://avatars.discourse-cdn.com/v4/letter/p/cab0a1/32.png) [@PanagiotisKostopou](https://forums.collective2.com/u/PanagiotisKostopou)
#### Post date: [January 29, 2010, 4:40pm UTC](https://forums.collective2.com/t/keep-after-worst-case-slippage-mistake/5200/1 "2010-01-29T16:40:28Z")

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Hi Matthew,  
  
my keep after worst-case slippage rate dropped suddenly to 50% on system “Aristoteles”.It has been “hovering” around 97-98% for months,and suddenly today I saw this dramatic change,which cannot be justified by the trades placed and the fills received.Please re-examine and re-calculate,as the same trades were placed to “Aristoteles Premium”,which has not been affected (like it should n’t).  
  
Thank you for paying attention to the matter.