I remember coming up with the "hand opening" sign in Brazil and we used it everywhere. I put an open circle where the first open finger started and then it was an arrow curving around the hand. That detail was enough so it wasn't super detailed (didn't show all fingers, just which finger started the opening). 
Charles Butler
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Clear writing moves business forward.

From: Valerie Sutton <[log in to unmask]>
To: [log in to unmask]
Sent: Thursday, March 1, 2012 4:23 PM
Subject: Re: Opening the knuckles from the hand, one finger at a time

SignWriting List
March 1, 2012

Hello Madson, Charles, Stefan and everyone -

Big smile ;-)

There are two ways to write Finger Trills - both are fine. I personally prefer this one, which shows the progression of one finger closing or opening and then the next and the next and the next - one dot at a time - you start reading at the end of the arrow and move towards the arrowhead direction - These are very detailed symbols:

On Mar 1, 2012, at 11:08 AM, Madson Barreto wrote:

Hello Valerie and everyone

Studying on "Opening the knuckles from the hand, one finger at a time", found the following:

"The fingers are extended, opening the hand one finger at a time, starting with the index and ending with the little finger. [...] Note: In some languages​​, opening or closing the hand one finger at a time Can start with the pinky or the index / thumb. In some cases it may be
contrastive and you will need to Specify Which finger starts the process "(Parkhurst & Parkhurst. A Cross-Linguistic guide to SignWriting®: a phonetic approach, 2008, p. 70)

In Libras has several signs that this movement begins with the pinky finger. I thought to adopt the following convention: put the symbol "Opening the knuckles from the hand, one finger at a time" near it (pinky finger) so it was clear that the movement starts for him.

See the examples:

Madrugada (Dawn)

Explicar (explain)

What do you think?

Madson Barreto