http://www.findmall.com/read.php?19,1305087,1305391#msg-1305391
http://www.findmall.com/read.php?19,1510171,1510250#msg-1510250
http://www.findmall.com/read.php?10,1446736,1447279#msg-1447279
http://www.findmall.com/read.php?19,1542536,1542689#msg-1542689
http://www.findmall.com/read.php?10,1443523,1443837#msg-1443837
Key #1 is sound and sound ALONE.
It could mean a million different things....some of them being a deep silver coin....deep coin in junk....deep coin in iron....deep coin on edge...deep coin on the brink of audible detection depth...etc. It isn't a science and it won't do any good to try to explain the other million things that dancing cursor could mean. You just have to keep putting in the hours and hunts to learn what it is saying to you.
Most of my best silver coin finds have come when the cursor dances and flutters along the top right 50% horizontal edge of the screen,,,,then moves towards the top right corner.
When it does the dance...then flutters and stays towards the top left center where my iron mask is set at...it is usually junk or iron.
If you spend your time watching for that textbook hit where the cursor will peg somewhere in the top right corner....you are gonna' be very bored and very disappointed. Most of those types of hits disappeared from sites nearly 10 years ago.
On a deep Injun the Explorers can do an unmistakabale "stairway walk" that definitely helps ID them. This is a perfect example of whre flashing numbers on a digital screen are worthless to me.
On many indian head hits the cursor will start on the right edge about 50% of the way down...then dance or walk "up the stairs" to the left.
Regardless of what your settings are or where the gain, sensitivity, etc. are set at...the cursor wll not peg and stay anywhere UNLESS you have run accross a "textbook" hit...and again...those are few and far between.
You will begin to see a pattern form with cursor movement over deep coins and junk only after you have spent a lot of time learning the explorer language. If you take the needed time to learn what it's saying though...you will be justly rewared in a way that not even the E-Trac can provide.