XPRESSTRADE
www.xpresstrade.com
Quoted from their web site:
" Access to Futures Exchanges Worldwide. We offer access to leading futures exchanges around the globe, including -- in addition to the U.S. markets -- LIFFE, EUREX, ParisBourse, IPE, Hong Kong, SIMEX, Sydney, and Winnipeg. Trade futures anytime, anywhere, all in U.S. Dollar-denominated transactions."
They claim "XPRESSTRADE offers one of the lowest commission rate structures in the futures industry". Check it yourself. As you know we IB clients will find it to be ridiculously EXPENSIVE! But since you want is a backup to IB, as suggested (or required?) by IB to maintain an alternative broker account, I think their rate is acceptable. Besides, XPRESS's order routing system seems to be completely independent of that of IB's or the most popular PATSystem-based ones, and clears through ADM Investor Services, worldwide access, electronic and US-floor, all of these best qualify XPRESS as a backup, not only to the hang seng futures, but also to all your other futures accounts.
Do I say "alternative", "backup"?
If particularly for HK market, you may check CASH Group,
www.cashon-line.com , HK's major local equities & commodities broker. English is ok. They charge the minimum commissions set by HK Exchange. You could choose to place order by phone call (due to your "backup" nature). Phone is picked up quickly. Again you could use it as backup to US and Europe's major stock index futures, and SGX-DT (was SIMEX) MSCI Taiwan Index or Nikkei 225, if you're interested.
Of course Lind-Waldock and Man, just to name a few, will offer you access to HK market, too.