vijay, patrader.
Not quite true! 0.5% model only means that lesser of your capital is exposed to what you've perceived as higher risk.
Risk Management, albeit important, is only one aspect of trading. Objective of trading (gaining profit in a well planned manner) has higher precedence than the objective of risk management.
I accept that we need a system/method with positive expectancy and edge in first place than RM.
RM is just another tool which has n number of possibilies to use.
I am speaking from my experience. I had followed a system which has 4 rules.
If all 4 rules satisfied I take long/short. But sometimes I feel skeptical even after all 4 rules satisfied, I dont know the reason. At that times I take trade with half the size than usual size, which gives some comfortable feeling. After some considerable amount trades , I analysed such situations and created a new rules/parameters.
And when I take contra trend trades for scalping , I do with half the size.
You cant say "Higher Risk" in such above instances.
Patrader is asking whether to reduce the risk to half or not, when a setup is skeptical . There is only two safe way , Skip the Trade or Reduce the size.