To anyone:
In backtesting you check the validity of a strategy for trading in the future to (hopefully) attain some sort of consisitent decent return.
2 conflicting, no 3 things I have read are -
market behaviour changes
markets go in cycles
backtests are there to show and give an edge
If market behaviour changes, what is the point of testing unless you test every day say since your market ever began, and even then, market behaviour can still change.
Then, if they go in cycles, you'll have good and bad periods (cheers to Yoder) so in the end it'll all work out?
db, I know you often say you should never exceed your backtested maximum losses and if you do, theres something wrong. Would you then say that means its changed enough to exceed, therefore you have to rethink your plan?
I am pretty sure last weeks tightness and excellent rolled up hedgehog impression, was due to little news/pre FED/August, but if next week is equally is bad, is it time to change or is it me being impatient through quiet periods and I should grin and bear it?
Obviously this is my decision but it would be annoying after alot of work for market behaviour to change and to start again only for the whole process to repeat. It would be enough to make you want to never test or have a plan again...