Usually, higher - volume forex players are
quoted tighter spreads (i.e. smaller difference between bid and asks prices).
Not exact matches
This should increase the likelihood that you'll be trading with another individual investor rather than a market maker, and that usually translates into
tighter bid / ask
spreads and greater size at each
quote.
More frequently traded ETFs are
quoted with a
tight bid - ask
spread, while less - traded ETFs generally trade with a wider bid - ask
spread.