There are many ways to query Retail Link for Performance information on items in your Modular(s). Select this LINK to download a Microsoft Word document containing step by step instructions for one way to query item performance information, which will return data in a format easily loaded into your Modulars.
See my post under "Tips N Tricks" :: "ProSpace" for step by step instructions to set up a ProSpace performance library, which will load the data into your Modular(s).