| > If someone who bought a million shares with an ideal exit of $5.10 sees 5 million shares for sell at $5.05 it can absolutely inspire them to sell cheaper because the idea is predicting directional movements. Your basic argument there seems is "new information can cause the price to move at random". And I accept that. But it doesn't matter to anyone on the lit market because the trades on the dark market would help or hinder them at random if they were publicised. If there isn't a systemic bias then it is just noise, I have a choice between the price on the lit market or ... the price on the lit market plus some random variable that might be positive or negative. It doesn't change how much money I expect to make. I'm not at any sort of disadvantage. It doesn't change my ability to value my trades and it doesn't cause me to think I'm going to be better or worse off. We already know that distinct market participants have different knowledge and world models. There isn't anything here that it is useful to adjust. > Think of it as a maze and every stock and price point combination is a doorway. This explanation literally makes no sense to me; I don't see how it matters. Someone offers to buy at $X/sell at $Y. Someone else chooses to take the other side of the trade or not. It is only that weirdly complex if you want it to be. If you need omniscient knowledge of the market structure to value a good then it isn't possible to trade it because your knowledge is always lacking information that is relevant to valuations. For example, you can't know about orders that are about to be lodged in the immediate future. We all have to operate with the understanding that some other market participants know things we don't and value things differently. It doesn't make the trading environment unfair. You seem to have a traders perspective here where you want to turn a turn an asymmetry of nearly irrelevant information into profit. I'm cool with that, but I don't care if it works or not. It sounds like a zero-sum game, someone is going to lose. and I don't see why I should be phased about who or why. I just want the market to offer to buy/sell things at a fair price. Dark pools don't seem to influence that in any way, the incentives mean that the price signalling should be basically honest. |