Quote from vanilla2:
AAAintheBeltway
Thanks so much. I will definitely share when I find something worthwhile. I have set out to trade either SPY, DIA or QQQ, with trades as short as an hour and as long as 2-3 days, primarily because of their relatively limited intraday movement compared with individual stocks which could wipe me out fast. Are commodities potentially better because they're poised for a long term rally and more trending patterns as the equity bear deepens and people move from intangible to tangible assets? Is there a deep discount commodity broker that I can access with a relatively small capital base?
Are commodities better? Well, the whole premise of system trading is we don't know, isn't it? We design a system to do one of three things: (1)participate in every big move, at the cost of getting dinged in choppy markets, (2) catch reversals at the cost of missing some big moves and getting stopped out on some true breakouts, or (3) exploit some market anomaly or pattern you discover. All proceed on the basis that price or pattern tells more than logical reasoning. Plenty of people can't swallow that pill.
Whether or not you should trade multiple markets with a system in part is determined by what kind of system you have. If you are trading breakouts, trend following type system, I would say yes, you need to trade at least 4 or 5 non-correlated markets. It's the one big move that will make your quarter and the more markets you cover, the better your chances. Kind of like fishing.
I would look carefully at the eurodollar futures (note , this is interest rate product, not eurocurrency), the grains, maybe bean meal or bean oil, cattle, and the currency futures. I have found that systms that work on these types of markets often do not work well on the stock indexes.
In backtesting, you need to make sure your data includes different market environments. I have seen several traders come on here convinced that a 30 minute breakout system was the key to trading the ES. It worked great for a period, but I know from prior backtesting that it will not alwys work well.
If you want to stick to the stock indexes, perhaps you should consider a hybrid approach in which you have some systemized filters and entry set-ups but manage the trade using discretion, or some variation. You can get screwed badly by data releases, Fed meetings etc without an override.