Exchanges: these are the physical or virtual locations where securities trades happen. Some securities are traded outside the exchanges, others are mediated over multiple local exchanges or dealers and don’t have a specific centralized exchange. Traders usually don’t directly deal with exchanges but through middlemen organizations called brokers who in turn provide their clients their best quotes for any given security (notice: their best quotes, not necessarily the best quotes). This is quite important, as some markets feature the so called “market maker” brokers who show their traders a price that is not the real underlying security price. In fact they don’t take a fixed fee but embed a variable fee inside the so called “bid – ask spread”. A very complete and in depth look at the market macro and micro structure is covered in one of the only two books about trading that are worth buying: Larry Harris’s ~1~
Hi,I’m looking into developing something similar, however how do you get the opening and closing of an item, at present I use a method similar to Element43. I noticed you said the methods could be improved, but I’ve been searching and have been unable to come up with any method on how to extract the data, if you don’t mind, how do you find them out?Thanks,
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