happy to say i completed my maiden trade on IB, had a tiny profit.

anyone looking for USD stocks investment or trading, i will suggest Interactive Brokers (IB).
https://www.interactivebrokers.com.hk/en/home.php

You need to create an order to trade between currencies inside your account - the rate you'll get will basically be identical to the rate on XE plus a small amount of Commission.

There's a couple of things to consider :

IB has 2 routing options - IDEALPRO and FXCONV - IDEALPRO creates a virtual currency position, and FXCONV actually converts one currency to another, by default it's always IDEALPRO that's selected - so make sure you change to FXCONV.
Another thing is - you're able to run negative balances on margin (ie. deposit USD , buy stocks in GBP) , if you deem the rate it not good at the moment, you can convert the currency at a later stage, you earn interest on the positive currency and pay interest on the negative balance.

No group that I'm aware of .. but plenty of IB users across different forums

Quite a few users here also, I'm sure any questions can get answered here

Just to add more explanation.

elea88, I assume you need HKD for HKEX. IB does not have the pair SGD.HKD. So you need to convert twice, SGD -> USD -> HKD. You can follow the suggestion by rjb123 for SGD -> USD (meaning to BUY the pair USD.SGD).
Then you need to SELL the pair USD.HKD to get your HKD.

Some basic concept about forex trading. For a currency pair, i.e USD.SGD, the first currency (USD) is the base currency, the second currency (SGD) is the quote currency. 
Assumed 1 USD = 1.3514 SGD.
When you :

1) buy 10,000 USD.SGD, you will get 10,000 USD. For this BUY, 13,514 SGD will be deducted from your IB account. The commission charged is 2 USD. Buying a currency pair will give you the base/first currency.

2) sell 10,000 USD.SGD, you will get 13,514 SGD. For this SELL, 10,000 USD will be deducted from your IB account. The commission charged is 2 USD. Selling a currency pair will give you the quote/second currency.

IB has a youtube channel with tutorials, i.e. Forex with WebTrader 

Hope this helps.

TIER. According to one blog post. TIER can save more.
https://thepoorswiss.com/comparison-brokers...brokers-tiered/

Is your IB pure IB or white label of IB?

Damn I don't have USD100k.

Just to add more explanation.

elea88, I assume you need HKD for HKEX. IB does not have the pair SGD.HKD. So you need to convert twice, SGD -> USD -> HKD. You can follow the suggestion by rjb123 for SGD -> USD (meaning to BUY the pair USD.SGD).
Then you need to SELL the pair USD.HKD to get your HKD.

Some basic concept about forex trading. For a currency pair, i.e USD.SGD, the first currency (USD) is the base currency, the second currency (SGD) is the quote currency. 
Assumed 1 USD = 1.3514 SGD.
When you :

1) buy 10,000 USD.SGD, you will get 10,000 USD. For this BUY, 13,514 SGD will be deducted from your IB account. The commission charged is 2 USD. Buying a currency pair will give you the base/first currency.

2) sell 10,000 USD.SGD, you will get 13,514 SGD. For this SELL, 10,000 USD will be deducted from your IB account. The commission charged is 2 USD. Selling a currency pair will give you the quote/second currency.

IB has a youtube channel with tutorials, i.e. Forex with WebTrader 

Hope this helps.

Funds are available to withdraw 3 days after depositing.

No problem to empty the account, assuming no margin is in use.

Is it possible if after I funded IB, I withdraw 100% of it? Say few days later and leave zero inside?

Nice   
Cause got nothing to buy so not going to buy for the sake of buying.
You dump USD100k with IB/trasnfer USD100k worth of shares to IB? Cause if don't do that got monthly fee of USD10.  

Er I meant for withdrawal. Which bank do you guys put for withdrawal?

Just want to ask m,  I am going to open with Tradestation.
They ask for USD 5k, now if I deposit > USD5k in terms of SGD is it OK?  Or do I need to convert?

elea88, rjb123,  hyperzz what SG bank did you link to  IB?

I know. But I am opening with whitelabels.

Seriously SGD1k also can.  But SGD1k is not USD1k. 

did you manage to withdraw and see it in your bank account? How long would it take to withdraw to ur bank account

Guys, how come my button became like this? When I click trade, it stays at logging in only. I can't even add any watchlist.

IB webpage. When I login.

Dear all, a very noob question, how do I know the currency of the ETF i'm looking at in IBKR? Thanks a lot