Trace would be slow, if you use it for a long distance smile
If you trace for the 5 quants ahead, it would be fast enough wink

1st prize: Lite-C and Newton 2.17 by Vasilenko Vitaliy

Newton2 videos: http://tinyurl.com/NewtonVideos
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Latest LiteC+Newton2 version(v23, from 29.10.2009): http://depositfiles.com/files/ae1l0tpro