I started reading the thread with curiosity. Now it strongly re-confirmed my thoughts on trading i.e no system alone will work for stocks ( except in rare conditions ) without considering the market, international market conditions.
That is a given. If you are searching for a system which gives you 90% strike rate with adequate profits, then you will keep on searching.
There are a few points that need to kept in mind when following any system.
First expect your system to stop working at any time in the future. Because it will. Surely if it is a good one, it will stop working only for a short while, but rest assured it will.
You need to be prepared for it. Look for any signs that point to the same. There are always signs. If we take the current example, the system has given me 10 long signals yesterday. This was on top of the 5 it gave me on thursday. So this is a clear sign that the market might turn even more negative (this being a contra system and we are long in 12 positions if you count friday's signals).
You have two choices here-
1. You keep on adding to the longs and see where it goes.
2. You be selective and patient about it.
Now if the markets were really to break down, I would be getting around 10 long signals for the next 3-4 days. Now imagine the king of losses that i would be making in all those long positions. It would take me almost all of the year to recover back all my losses and then at the end of the year I would have nothing to show for it.
So during these times what you need to do is keep your positions light and keep on monitoring the system because you never know when it would start working again.
What actually happens is we start over-trading. Here we are facing around 65000 unrealised loss. Lets say we book that loss and what we start thinking is that now when the next signal is generated, i would take twice the positions to recover all the losses that i made. Happens to all of us.
But the most important part is that you do not miss out on the time when the system is actually working. This is a mean reverting system and we very well know that market spends a lot more time consolidating then it does trending. So I am not worried that by not trading the signals that are generated right now, I will miss out on all the profits. Believe me there are lots of opportunities that the market will provide to make money everyday. Key is to focus on some of them and not get carried away with all the profits that others are making.
Hope that this was somewhat helpful.