The Open to Buy report has been improved to be able to use your actual turns rates (as opposed to manually defined turn rates), to determine what the Min/Max should be. This is a far more powerful approach and improves the accuracy and relevance of the open to buy guidelines.
Dynamic Targeting can be enabled in OTB Parameters, under the Min/Max tab. It is important to note that upon changing this parameter, your OTB range will likely change materially. If you would like to update to Dynamic Targeting, please email us a request at firstname.lastname@example.org so we can help walk you through the changes in your OTB report.