They are constantly tuning their price algorithms so it does not seem unreasonable to see values jump around now and then.  

I understand that Zillow's algorithms use information from areas that may over-extend the boundaries of the primary area of sale to come up with an estimated sales price.

This allows you to borrow all of the payment/transaction history (which is roughly 35% of the weight to your FICO algorithm/score) all the way back to when the card was opened.

I wouldn't use their algorithm solely to rely on a value of the property.

They determine value by algorithm w no particular knowledge of market or condition of property, the two MOST important determinants of value.

There is needed to be an algorithm which should do the counting and sorting of priority for receiving request. 

When you apply for a loan, your lender will need to run an application using their own credit reporting systems and algorithms they have purchased from various credit agencies....The only purpose of a "MyFico" type of product is so you, the consumer, has a good idea where they stand.Secondly, please don't obsess over the number of inquiries you have on your credit report.

This was probably never a thought when they started.I can tell you that they have a "proprietary algorithm" for reporting property performance that is complete shite.

FB has a lot to do with the algorithms and what you post. 

In response they have revamped their algorithm which flag more posts, pages and otherwise.