Anyone who varies his Position size probably does not have an idea of how an edge works in a market. When u have an 'edge' or can define an 'edge', u take all trades on ur signals regardless. The term " conviction of strat" or w/e is baloney.
By varying position size i do Not mean the actual lots, but more the actual percentage of acct risked.
Say u work on a 1/2 percent risk model, and scalp 10 points on a 10 pt stop a couple of times a day. Also u "expect" ur method to give u a 60% hit over a substantial sample, {{ for example 5 lakh acct can affor u 5 lots on the 1/2 percent model, 10 lots on 1% etx}}. Once u use fixed fractional then u STAY fixed fractional ............................. WHY????
Because u have no way of knowing which setup to cherry pick for ur risk o meter and apply different percentages too. (matter of fact a real shooter of a move will mostly never have an Ideal setup.... do u see why?)
If and only if u have a robust sustainable edge, then u TAKE THEM ALL, at the same level.
Seems like the challenge results are flawed. If i was a hedge fund recruiter/mgr/whatever, I would look at drawdown, average risk, average loss, average gain, max risk/loss/profit, Sharpe ratio, Max adverse excursion in trades tht won, hit rate etc. There are many ways to analyze traders performance, many metrics tht can be used, net profit is quite the worst. (yes just looking at P/L will drive u broke, any idiot can make a million dollars on one trade).
Her's the thing, when u buy nifty at a price, there as an equally smart dude on the other side trading on his own strat and timeframe who is willing to sell it. Even if a program (intitutional) buys at a level another program might sell there, mostly in the day price movement is 50 50 either way (small number of pts tht is), sometimes it is 60 -40 (when big institutions are in confluence), u strike then or hope to strike then. The funny thing is, depending on the timeframe u use, it might take u years sometimes to realize that you dont KNOW ANYTHING.
Trading --- the final frontier.
Im going to reccommend the first trading book i read
Nicky Taleb (Fooled by Randomnness)
Ur smart Sachin, friendly pointer, not being nitpicky (this and the algo post were the only posts i thought u were off in the past two years).
its very popular, most of u who have read it, could read it again, flipkart it, dont download it (respect and pay for knowledge)