When discussing this many years ago with a successful punting friend he suggested with automatic rules like in betting systems 4l. plus often indicates a very weak beaten field.

Different when using judgement etc.

If you find no other horses from that race where this horse won have gone on to be competitive or win then yes it is a weak field and you discount the winning lengths, but if 2 or 3 of those horses have gone on to place or win other races then its a very good 4L win.

As always its a "depends" which make the difference of a profit or a loss and it needs to be coded into your system logic or handicapping process.

yep, max 3.75len as a guide, use your own judgement anything over

NZ Horse of the Year Awards,,Fastnet Rock filly Avantage was a resounding top choice as Champion 2YO
6 starts 5-1-0,,800m - 1400m