After some serious thought, I decided to adapt this system to suit my particular trading style. Henceforth I shall always be in the market with the following 12 currency pairs:
USD/CAD
GBP/JPY
EUR/USD
GBP/CHF
USD/JPY
EUR/JPY
EUR/CHF
USD/CHF
GBP/USD
NZD/USD
CHF/JPY
AUD/USD
I will not spend more than one hour per day on it. In this hour I will re-open any trades that had been closed, and move the SL for each pair to the current Parabolic SAR value.
On Friday just before the close of trade I will manually close positions showing a high profit, ensuring that there are enough positive positions left open to cover weekend losses.
I know that this deviates from the “never mess with trades” rule, but it makes me nervous to leave the profitable positions alone for the entire weekend, so I’ve opted to grab some profits at the close of the week.

Click for enlargement.
So here are the revised rules:
- Trade on the daily chart.
- Trade the same pairs continuously.
- When the Parabolic SAR dots are rising, enter long.
- When the parabolic SAR dots are falling, enter short.
- Exit and open in the opposite direction when the trend reverses.
- Money management: set the stop loss to the current Parabolic SAR value.
- At the close of the week, close positions showing high profit.