how do you think about a strategy which runs well on one stock but failed on others?

cf0532 said:
yes you are right;
but most time the reason for difference between stocks are not so simple.
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Sure but after a while you start to get a feel where a stock might fit along the spectrum. Great news might come out about a megacap name and it might pop for maybe 20% and that would be front-page news. Where as some great news hits a small cap biotech name for example and it says "20%? aww that's cute.Now watch me pop for 700% over the next two days".
 
cf0532 said:
Sometime I think out a trading idea and then I back test it on one stock, which shows nice; after that I would test it on many stocks, by which at last I find the strategy runs well on several stocks but also failed on many other stocks.

Shall I believe this strategy(only use it on several stocks)? or the strategy is just random and which should not be believed at all(that means we only believe a strategy which runs well almost all stocks)?

Or another question: how can you confirm your strategy is ok to real trading?
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Leader or laggert?? Educational example= MPC has trended better all year than MRO, edit.....
I made some money on single stocks; but XLE benchmark = down YTD, when SPY = UP.
Single stocks are not a gamble or random walk; but like Dave ramsey\ noted average for most is 7.5% compared to 11or 12 % annualized on SPY benchmark .
But The WSJ had a big article on the guy that wrote ''Random Walk Down Wall Street., said he did some gambling so he does some single stocks LOL:D:D
One thing that kept me from blowing up on single stocks\ i allowed a 50% gap against me.
Fidelity ContraFund usually beats SPY benchmark so it can be done. Excellant question.
 
lindq said:
But in many cases the differences are significant, and important. It may help you to pre-scan and create lists of stocks with different characteristics, prior to back testing and forward testing. For example, EPS (earnings), dividends, TR(Range/Volatility), industry, etc. etc.

As just one example, at one time I traded a "pullback" system that looked for weakness in equities. I scanned and created a list of stocks that had strong volume, and strong and growing EPS (profits). The reasoning, which worked, was that buying into technical weakness on otherwise strong companies was preferable to just buying into a random list.

This takes time, but you may find that there are one or two specific characteristics that respond well to your strategy, or to a new strategy.
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nice;
it is really important to find out specific characteristics;
could you share which characteristics you think are very important for a trend trading? such as volume, volatility and so on?
and we would never real trading unless we know the characteristics which should be validated, yes?
 
Option_Attack said:
What I've seen over the years is that, for me, the strategies with the longest lifespan trade exclusively ETFs like QQQ and SPY. Find one that seems to work on those, backtest and forward test and let 'er rip.
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Good points\
every 5 years more or less /LOL/ DOW/DIA.
Even if SPY + qqq /QLD may do much better long term..................
Some one has to be Peter lynch + Warren Buffet/stock pickers/ not me.
Warren buffet said ESG= ''asinine'' .
SVB = asinine +stupid x9 \ i almost bought that stupid\asinine SVB.
Valleys .....mountains .....FLOWING......................................../ that is where i'm going;
Ivan Parker Song/ good song to park on LOL:D:D
I seldom do single stocks any more even though JAN worked OK;
but I noticed SPY + QQQ + QLD, in JaN beat my single stocks%, so depends on what a trader /investor wants...............................................................
 
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