Thu 13 Dec 2007
Trading and Making Money
Posted by ray under Written Plan, Money Management
Two trades in Crude Oil illustrate my approach to making money in the trading game. If there is a Holy Grail in trading, it’s reflected in the formula:
(Avg$Win x WinRate) - (Avg$Loss x Loss Rate) = > $0
In other words, what is important ( taking the win rate into consideration) is for our $ win to be greater than our $ loss.
To maximise the difference, I seek to exit a position BEFORE my stop is hit. So when I say that my trade has an 80% of success, this does not mean that I have an 80% probability of making money. Given that my win rate fluctuates between 47% and 55%, the comment “80% probability of making money” would be sheer nonsense. What the statement means for me: if I exit before my stop is hit, I have an 80% chance of being right. This means that in 80% of the time, if I had not elected for early exit, my stop would have been hit.
Figure 1 shows my results for 2006, my trading year is from September 1 to August 31. My aim is to make around 25% per annum. In 2006 I had a better than average result even though my win rate was slightly below 50%.
Figure 1 2006Results
But early exit comes at a price: there will be times that when exiting a position means I’ll re-enter at a more adverse price. This is what happened with the most recent Crude Oil trades.
Figure 2 shows a classical “Negative Development” buy setup and entry (For Negative Development see previous posts and Nature of Trends). Note that I use CSI’s Perpetual contract for analysis and the appropriate nearest futures month for stops and entry levels.
FIGURE 2 Negative Development
What I expect following Negative Development setup is strong continuation. Instead, we had two inside days. So, on Dec 11, I exited the position with a 0.36% loss. I exited not because the trade had done anything wrong, but because it wasn’t doing what I expected.
I did plan a re-entry on a breakout and this was triggered last night. This second trade can’t lose because I exited 1/3 at last night’s close, moved my stop to breakeven on the second 1/3 and left unchanged the initial stop on the last 1/3.
The early exit cost 0.36%. When you consider the difference between my initial exit and breakout entry, my loss on the trade was 0.42%. But I am happy to wear the loss which with hindsight need not have occurred. But that’s the point: only precognition of last night’s breakout would have kept me in the trade. And since I don’t have that skill, I was happy to bail and happy with the way I managed the trade.



























December 14th, 2007 at 6:01 am
Ray
Just to translate your Expectancy Formula to illustrate your point from your results sheet:
Win rate : 169/341=.49
Loss rate: 172/341=.50
Av$win x win rate ie $5999 x .4956 = $2973
Av$loss x loss rate ie $3800 x .5043=$1916
Expectancy Formula = $2973 - $1919= $1056
Therefore, EF is positive and hence, 341 trades x $1056 trades will give you $360,096.00 for the 12 months.
Actual profits for 12 months =$360,210.4. Therefore the results are close to the expectancy formula.
Am I correct in interpreting your formula? I see it as a way for monitoring results and estimating the edge of my trading system
December 14th, 2007 at 6:29 am
Hi Anna
Thank you for fleshing out my thoughts. Greatly appreciated.
Yes you have interpreted the formula correctly.