PRESSURE TENDENCY Look here..... http://www.met.tamu.edu/class/metar/quick-metar.htmlFrom A&M University where my Daughter will be going to be a Meteorologist.
$100 worth of reference material plus access to the AOPA website and none of it mentions pressure tendency.
US Metars seem to have a level of complexity we don't have here on this side of the pond. Some of it seems a little superfluous or too detailed. But I suppose there is a good reason for it. I rarely have to look up TAF or METAR decoders, unless there is something odd happening with the weather. Some websites translate METARS and TAFS into 'plain' English which is handy for rarely used codes. Interestingly I find it much easier and quicker to read the coded version. Particularly when you have a series of METARs. A single glance is usually sufficient. Has anyone else noticed this?