Mortgage rates were roughly unchanged yet again today, although the average lender was charging microscopically higher fees compared to yesterday.  The key ingredient in today's market movement (which ultimately translates to mortgage rate movement) was the promise of a deal to avert another government shutdown at the end of the week. 
Late in the day yesterday, congressional leaders on both sides of the aisle signaled a potential deal was in the works.  The fact that Trump didn't immediately dismiss the deal was taken as evidence of its viability.  This resulted in bond markets losing ground today, which normally coincides with higher rates.  It was also the inspiration for a good amount of today's improvement in stocks.

The reason for that movement is fairly logical.  The shutdown (or the threat of another shutdown, rather) is something that creates uncertainty.  Investors are less interested in taking risks amid uncertainty, which usually means stocks lose some ground and bonds improve (i.e. rates move lower).  Beyond that, an actual shutdown would have actual economic impacts that prompt a similar response (stocks down, rates down).  With that in mind, an end to the shutdown drama logically carries the opposite connotation.  The size of the move is small enough to let you know that the shutdown is more of a sideshow when it comes to its impact on rates.

If the shutdown news is a sideshow, what constitutes the main event?  Sometimes that's the sort of thing that we'll only know after we see it, but it's a safe bet that any major breakthrough on US/China trade relations would carry more weight.  Additionally, as economic reports begin flowing again (many were on hold due to the shutdown), markets will have a clearer idea of which way they should be moving.  

ND's Daily Rate Survey
52 Week
30 Yr FRM4.45%4.44%+0.014.43%5.05%
15 Yr FRM4.06%4.05%+0.013.86%4.53%
FHA 30 Year Fixed4.14%4.13%+0.014.12%4.62%
Jumbo 30 Year Fixed4.29%4.28%+0.014.28%4.81%
5/1 Yr ARM4.37%4.37%--3.44%4.75%