Thank you Kate.
But on
http://www.100forexbrokers.com/stp-ecn-brokers/cpage-8 I discovered this:
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tadawul fx is listed as an stp(that got me interested in them). But this is what we found on page 5 of their account opening form, under the heading 'overall risk disclosure':
thing 5:'A Bank or Broker through whom TADAWUL FX LTD. bargains or TADAWUL FX LTD. itself may act in precisely the same market as you, its account involvement may be contrary to your interests....