as a discretionary trader for 18 years in FX, options, and stocks my edge is position sizing based on my confidence level for that particular trade. that confidence level, whether you call it intuition or something else, is achieved from many hours spent each day maintaining a feel for the markets i am trading. there are so many variables constantly at play affecting to some degree the possible outcomes of the trade that each person is literally using everything they have experienced as a child, in school, in university, in relationships, in their personal financial situation, in what they heard on the news this morning, etc to make decisions every second that your particular market is open. i have a had several traders sit beside me for months at a time, trade the same things i was trading, and not be able to make 10% of what i was making. after analyzing what was leading to the variance it basically came down to the fact that they were trying to copy what i was doing in the particular trades but were not copying what i was doing to make the decision to take the trade; the hours before and after market doing research and analysis which inevitably lead to that instinctive decision of what, when and how much of a particular market to trade. over the years i have automated some strategies which are pure mathematical edges but during market hours my trading is done without charts and indicators but with lots of market breadth info, global indexes, and futures market data that assist the mental charts in my head of what the action of the things i am trading that day look like. discretionary trading works for me. mechanical trading may work for me in the future when trading platforms are capable of digesting everything my brain is able to and simultaneously execute trades similar to those i would have executed myself.


