刚巧看到这篇文章,比较能支持我目前的看法。
My purpose in starting this thread is to pull back the FOREX curtain just a bit, so we can take a good look at the "wizard".
First of all we need to understand what we are talking about when we say ECN.
The first thought that comes to mind are the ECN's that enable trading on the NASDAQ market. These ECN's, do nothing but communicate Bids, Offers, Last, Size, depth of market and orders. Hence the acronym, ECN, Electronic COMMUNICATIONS Network
Here are some points to remember about true ECNs and the market places they work in.
1. The ECN has nothing to do with setting the prices
2. The ECN communicates with a central market place
3. The central market place (nasdaq) pushes the quote data of the price action on the different ECN's, which includes depth of market and Id of participant if shown, to the broker, the broker then passes it on to the trader.
Now here are the differences
1. Forex does not have a central market place
2. The ECN programming does mess with the prices
3. There is a limited circle of liquidity
Lets use an example, I bid 50 qqqq at a specific price. My order waits in line until it is filled. Now here is the biggest difference between Forex and Nasdaq, this bid is being offered to the whole universe of Q traders, not just a select pool of liquidity, or two or three liquidity providers. So no matter where you live or who your broker is, if the feed comes from the Nasdq, everybody sees the bid, 50 shares qqqq at x, minus any latency from the broker.
Knowing this we can compare our example to the CurreneX (CX). CX in its purest form is a true ECN. But since there is no central market, the brokers control the liquidity. Remember also that CX is fully customizable by the broker. This means that the scope of liquidity seen by the trader is limited by the white label broker. The CX allows for "hubs" of liquidity, or groups of liquidity providers.
For example, if your broker has a relationship with 5 banks, and 5 large hedge funds/brokers, plus any "local liquidity" or retail traders, this is what you will see on your quote feed.
But we are only talking about quote feeds above, the broker can also restrict who you execute against. So out of 11 feed providers you may only be executing against 1 hedge/broker and the locals, and not the banks. And really, if you are not executing size, you are not going to interact with the banks.
Of course if you need more liquidity the broker will only open it up to you if you are trading larger size. The reason for this is $$$$$. To get to these feeds the broker has to pay, so to make up for this, you, trader dude or dudette, need to trade size so that they can be compensated for the fees they pay. Remember the larger the size the greater the fees. (egad, did I just say that!!!)
Now Hotspot is another true ECN, but they do not use liquidity pools, what you see is what you get. But remember, you only see the quotes and liquidity that Hotspot provides through the banks etc. that they have relationships with. They do not have all of the banks in the world trading on their platform.
Why is this the case, again, no central market.
Now there are other platforms that claim to be ECNs, and compared to passing orders through a trading desk I guess in a sort of a Forex kind of way they are.
But the programming of the platform changes the spreads with some platforms. For example one broker clearly states that during time of high volatility the spreads will widen. Ok, we know this going in, but where does this widening of the spread come from. It DOES NOT come from the banks, if you have a pure feed from Hots or CX, you will see that the spreads in general, do not widen right before news. The spreads will bounce like crazy for a few seconds, but this is normal price action. Any platform that has a fixed wide spread before news is doing so artificially.
Why do they do this? How the heck should I know. Some say it is to prevent incurring losses, and other reasons. But I will tell you it is not the banks who do this.
Now what does this mean to retail traders, not much. For example my 50 shares of qqqq will probably be filled by some other wiener like me who is trading 50 shares, and not by CANT or NITE. So even if your Forex trades are executed against other traders and not by the banks, if you are profitable who cares.
Again, there is no guarantee on the Nasdaq that you will execute against NITE or CANT if you are not trading size, but you are literally participating in the whole market and not just a segment.
The problem is that some brokers like to represent themselves in a way that is, well not exact. An ecn on the Forex works wayyyy different than an ecn on the Nasdaq. To some it may be a case of "define ECN'" and semantics. But you have to know that when somebody sees the acronym ECN used they think of the Nasdaq model. This is not the case in FX |