Quote from taboni:
I have worked as a market maker at major banks and I also trade on Hotspot so I will try to answer you as best I can.
1. Most of the time you widen your spread. It rarely suits a market maker to drop their prices totally. There is a great opportunity to make money as a market maker when showing very wide spreads. In horrific times people will deal on any price they can get so it doesn't suit to pull them out entirely.
In Hotspot, while I have never seen extremely wide spreads, I have seen spreads widen to say 5 pips should there be a huge announcement, but this has been momentary at worst.
2. While I have never posted prices to an ECN, most if not all banks use an algorithm which draws rates from several sources such as EBS, Reuters matching, etc and then they shade/widen to suit.
I don't know of any third party applications such as Tradestation, etc that you can link up to Hotspot, although you can access them through the Realtick platform via Terra Nova trading.
3. I have always had excellent execution and liquidity in the 4 years I have dealt with them with no complaints. The only criticism many people have that I have read of is their 10 pip exclusion when trying to modify, enter, or cancel a resting order with them. They have this in place since the banks they leave orders with have the same sort of exclusions (most if not all single bank platforms have the same exclusions, some worse). I can tell you from personal experience that this is more of a guideline and they will try to get your order changed/cancelled etc to their best ability. I have only been really denied once and that is when I was trying to change an order that was already at the price.