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Yes, evaluating walk-forward performance has to be done in hindsight. However, that's completely irrelevant for the question if the results were better than random. In this case, the results were amazingly close to random, essentially identical. As a matter of fact, the APS patterns had no edge...

About that article by Michael Harris. I did my own analysis with the same setup. Buy on open, both profit target and stop loss 7 % away from entry. Tested with the same data, daily QQQQ from 05/07/2002 to 08/22/2008. I simply bought on every open and got 1562 closed-out trades, 950 winners and...

Nice way of saying that 6 out of 8 became less profitable.

@ bashatrader There is no mentioning of slippage and commission. Besides that... Do you think you would see that page on his website if those patterns failed? Do you know in how many magazine issues Harris presented some patterns? Looks like you can start right here with your study of...

For illustration purposes, think about a Donchian channel breakout system. Does it make sense to consider any different length parameter a different system? Like for example 3342, 3343, 3344 minutes are all different systems you select. Guess what it doesn't matter, the end result is the same...

I'm surprised you didn't reply to MarkBrown. The functions below are equivalent. C > C(1) C - C(1) > 0 What does that tell us about the relevance of arithmetical operations for curve fitting? You are correct about the prevalence of selection. However, when it comes to trading systems I...

Are you saying that C > C(1) is not a function and does not involve a mapping operation, like mapping a pair of closing prices to true or false? No, I did not say that. You missed out the backtest of all variations. You are not looking for the best fit if you just randomly decide something.

I suggest going with an existing backtesting platform that allows you to set up your own pattern search. It's not that difficult, only making it more efficient requires some thought. Like don't check if the low is greater than the high of the same bar, don't check for equivalent patterns etc...

I found that arbitrary and tailored for APS. I questioned why price "patterns" only involve no other than Boolean math operations. You mentioned inside bars. What about a simple range expansion (or contraction)? That involves a subtraction. high - low >(<) high(1) - low(1) Bottom line is...

Very nice evasion. Looks like you got called out on your shilling with bogus claims and now want to dive away. Nevermind, you are just a clueless tool for your guru, so who cares.

I do understand very well that you again try to obfuscate your way out with hiding behind semantics. First it was all about how price action does not require any parameters. Now it is about operators and mappings, functions and curves, patterns versus formulas. What a joke you are. You claim...

@ intradaybill You did not reply so far. I would still like to clear things up so here is my best guess about the real reason for your claims. It looks like your guru Michael Harris confused you into believing that price patterns were not subject to curve fitting as part of his APS software...

You did not address my main point about your arbitrary assessment. Signal A buy if c > c(1) buy if c > c(2) buy if c > c(3) Signal B buy if c > c(1) buy if c > (c(1) + c(2)) / number of summands buy if c > (c(1) + c(2) + c(3)) / number of summands Why do you declare the 3 lines...

I think your assessment of - what values can be changed "afterwards" and what values cannot and - when to view something as one system that gets adjusted and when to label it different systems you select from is mostly arbitrary. I could as well say that changing the lookback...

I agree. Let's say you buy if the close is greater than the previous close. Now you need to determine what the *previous* close is. As said earlier, any delta amount of time or volume or price is a parameter. If you adjust that parameter somehow to improve any performance measure, you are...

I think the OP is asking a tough question. Obviously the goal is to have a strategy that will perform well in live trading. But how do you get there? The development process can be a double edged sword. You never know if any decisions you make will improve or worsen the future real money...

You can make a difference as a consumer. Boycott China. Avoid buying their cheap crap whenever you can. Many products made in China are contaminated with high doses of polycyclic aromatic hydrocarbons. Even children's toys. They could use harmless plasticizers but the excess tar oil from their...

It seems like most data vendors are simply transmitting the cash index feed of the exchange. For example, in TradeStation there is $SPX.X from CBOE and $INX from US. However, both symbols are only updated every 15 seconds. I'd like to get more frequent updates like every 100 ms or so. Does...