Welles Wilder's Parabolic SAR

["Glen Wallace" <gcwallace@xxxxxxxx>]

Does anyone have the formula for Welles Wilder's Parabolic
SAR or, better yet, the MetaStock code for it?

I'm trying to develop an exit that adapts to accelerating price
moves and protects profits a bit better than something like
Chuck LeBeau's Chandelier exit.

Thanks.