0.5 precision versus 0.1 precision

Dukas has 0.5 precision, which as far as I'm concerned, add 0.2 pips to their spread both ways.

Any low commission volume brokers that quote in 0.1 precision and have the features of Dukas (API, level II quotes, etc)

Would you mind telling how is precision calculated? Like alpari,mbt or any other 5 digit brokers, how is your so called "precision" defined?

This is actually a good question. I read on a thread that Dukascopy only quoted in 0.5 pips. So, for example, you could buy E/U at 1.40705 or 1.04070 but not 1.40703. They rounded to the nearest half pip.

I'm not a dukas trader, so I'm not 100% positive that is true. Anyone know?

Oh I see, I think Fxpro and alpari has 0.1 precision, I've demoed in these 2, Fxpro has variable spread whilst alpari has fixed. I don't know about the rest, MBtrading has 5 digits but AFAIK they data are smoothened so not very good for scalpers.