Traders try to keep their successful strategies a secret, but most strategies "work until they don't" meaning that the algos making money today are not necessar

Traders try to keep their successful strategies a secret, but most strategies "work until they don't" meaning that the algos making money today are not necessarily the same ones that were making money in 2012. Furthermore, as with technology companies in general, traders and developers move around between trading firms, and the ideas move with them.