Flexible-rolling total money management regime

i.e., $1600 deposit, or $2200, whatever, in account, risking $40 as a rolling total first week, and that as your allowance or discipline.

e.g., trading 0.12 or 1.0->1.2 minilots, maybe in ~3~ 0.04 bursts, moving between martingale, tiny drawdowns, and normal trade, from trend following to buy/sell stops or buy/sell limits or other orders below or above significant economic numbers. Individual trades may have a circuit breaker of 100 pip SL or 60pip, whatever is appropriate.

e.g.,

Mon +$7
Tues -$3
Wed +$2
Thu +$11
Fri +$2, perhaps a larger gain may occur but closing positions before the weekend

WEEK 2

Mon +$37
Tue +$5
Wed +$8
Thu -$1
Fri -$12

Anyone do this kind of short-term take it day by day stuff? You've gotta be at your peak. Circuit breakers are so you're not caught short EURCHF before the SNB puts in a 1.20 floor. In fact, one's trading journal may include, from years of experience, and memory, and know how of how policy makers think--big crosses like "I'm no longer trading EURCHF, this market (Sept 2011), is a go into cash market".

"I remember USDJPY at 116.00, now we're 80.00, and this earthquake tsunami stuff by long term valuations means LONG only when I trade USDJPY".

You may say, I like this market I've got a feel for it, I'm going to trade with 15% instead of 12% of my capital, etc.

Thoughts? I've always traded best when I've approximated this and thought in real dollars, percents, and points, all at once.

In the end, the profit matters ( or the lack of it).
In both of your example week you are ahead 1%+ for the week.
It isn't a zillion % or a living from it happily ($2000 account?)...BUT it is about 50% a yr, which sure beats any banks interest in % or in $$ amount.

Personally I think when one trading in a very small, or small account, he/she shouldn't be aiming for the big bucks just. Treat it as a hobby, a learning, and once confident, find the way to fund an account properly. It is always easier to make that $50k on a $100k account, than grow an account from $50 to $50k to have the same profit in hard and spendable cash.
Oftentimes there are fantastic demo returns, and no real accounts to replicate them. And no, demo isn't like trading real, by far, for many different reasons...

Even if I would be doing 10% a week on a $500 account, one has to stay in reality, that $50 wont buy me my dream Ferrari, not even put food for the family table every night. With all the time invested, it is a hobby, that might pay itself, because from all this hours @ a job one could easily make that $50 a week, and much more...