Hi TT,
As a thumb rule you can expect to reverse after 5 days.
As a thumb rule you can expect to reverse after 5 days.
Your comment set me on a new path of enquiry. One was why do we have thumb rules which are no more than 'hearsay', 'intuition', 'tradition' etc when a rule can easily be verified. Data is not in dearth. And the NF trading began only in June 2000 which means we have to verify only about ten years data hence the sample world itself is small. So here is my finding on the 5 day thumb rule:
In all its history NF has had 5 and more trending on 78 occasions. Would we have made money if at the end of the fifth trending day we had bet that the market would reverse the next day? In practical terms it would mean that we take a short position at EOD if the mkt has gone up for 5 consecutive days and long position if it had declined for 5 consecutive days and hold it till EOD of sixth day.
You would have made money on 43 occasions and lost 35 times as the mkt continued its trend for more than five days. Percentage wise you would have made it 55% and lost it 45%. Not really a good thing to bet on. I have not gone into how much you would have made and lost just the number of times you would have made or lost.
The enquiry threw up some more things:
6 day trend has happened 14 times, 7 day trend 12 times, 8 day trend 6 times, 9 day trend 1 time, 10 day trend 1 time and 12 day trend 2 times!!
Less than 5 day trend was again no better than chance:
4 or more days trend occured 156 times where it terminated at 4 days 78 times and continued beyond 4 days 78 times. 50:50
3 or more days trend occured 318 times where it terminated at 3 days 162 times and continued beyond 3 days 156 times. Again 50:50.
2 or more days trend happened 609 times where it terminated at 2 days 291 times and continued 318 times. 47:53
Each and every unbiased enquiry into the market movement leads us inexorably to the single conclusion: market movements are random. market movements are random and market movements are random.
I have mentioned that there were two occasions with a 12 day trend. I don't know how many people can understand this: Such trends only prove the random nature of the market. If the sample were sufficiently bigger, you can find a 20 day trend too and still the mkt movement would be random.
Most people lose money because they do not understand the randomness. When a million people play the markets it is inevitable that a few would succeed with or without a method or a system. Randomness would require that. To the nature of the mkt when we add our own nature which sees what it wants to see, which is indisciplined, which has emotions like greed fear etc, we set ourselves up for disaster most times.