64
Figure 4.6 Trade day of the week: Friday.
take buy and sells on certain specific days.
To get a sense of this,
Figures 4.2 through
4.6 show the buys for
each
day of the week, then the sells for each day, and finally we put together the best buy/sell
days for a
working model we can actually trade.
The listings indicate the best days to buy have been Tuesdays and Thursdays,
whereas the best sell
days have been Wednesdays and Thursdays.
Figure 4.7 shows that if we restrict trading to just these days,
we don't
make as much money, only $56,43 7, but just about cut the number of trades in half and boost our
profits up to $173
on average, a number worth trading for. Your lesson here is that the Trade Day of Week
(TDW) can make a big difference in your system's performance. Best yet, the drawdown plummets to only
$3,500 from $10,031 and the accuracy jumps to 84 percent.
This is a big improvement, as explained in the
discussion of money management in Chapter 13.
66
A Look at Volatility In the S&P 500
Does this concept have application for the S&P 500?
Although there can be no doubt about this technique working with a 50
percent volatility expansion, we
can improve on it a great deal. How? By using something we already know about, the impact of TDW. The
next set of data shows the volatility breakout performance
by each day of the week for
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