@Pawel -- What kind of things do you look for in GBPUSD that distinguish it from other pairs? Not in great detail -- just a sentence or two... Also -- do the things you notice in GBPUSD persist over time, or will they change?

My "Ultron" EA for GBPUSD H1 timeframe

Curve-fitting is not bad. Curve-fitting is *exactly* what occurs when an algebraic formula is calibrated. In other words -- "curve fitting" is the the more proper algebraic (mathematical) term and is equivalent to what MT4 does when you use it to ...

My "Ultron" EA for GBPUSD H1 timeframe

Optimization vs Calibration... I just had an "ah-ha" moment. Maybe it's obvious to most people -- I don't know. Whenever I see people back test an EA using 2-year old, 5-year old and even 10-year old historical data I can't help but shake my head ...

My "Ultron" EA for GBPUSD H1 timeframe

@emonts -- interesting. Thanks for sharing your results. One thing I noticed is if you look at the charts from a distance they all look fairly similar -- which is great. When you drill down and look more closely at the details then you begin to see ...

My "Ultron" EA for GBPUSD H1 timeframe

What your observation reveals is that it is necessary to "recalibrate" EAs from time-to-time using current data. An EA uses indicators that are simple algebraic formulas -- often with only a single constant (i.e. a MA period). That single constant ...

My "Ultron" EA for GBPUSD H1 timeframe

There is no correct answer, since it primarily depends on how similar current market conditions are with market conditions when you last calibrated. Also, it is hard to define what is meant by "similar" market conditions -- that's rather subjective. ...

My "Ultron" EA for GBPUSD H1 timeframe

I like that. I do something similar with my other EAs. However, rather than choosing a specific data horizon, I'll choose a length of time that results in about 100 trades. As an example, for EURUSD/H1 then I'll need around 4000 bars (approximately ...

My "Ultron" EA for GBPUSD H1 timeframe

I think it's still okay. What your observation reveals is that it is necessary to "recalibrate" EAs from time-to-time using current data. An EA uses indicators that are simple algebraic formulas -- often with only a single constant (i.e. a MA ...

My "Ultron" EA for GBPUSD H1 timeframe

I was also thinking about Trailing Stops, but now I think it does NOT make sense for the way this EA is designed. This EA is designed to run and only close when it hits a SL or TP. In this way it can run for long stretches and overcome small bumps ...

My "Ultron" EA for GBPUSD H1 timeframe

@Pawel -- I had a question. Are you using MT4's Strategy Tester and built-in optimizing tool to determine the best values? Or are you using a different methodology? Thanks...

My "Ultron" EA for GBPUSD H1 timeframe

These types of errors are always hard to figure out -- if ever. Over the weekend I will see if I can reproduce the problem. For now, a few things to try -- though I'm just guessing: 1. How long is the data horizon? Try making it shorter, like just a ...

My "Ultron" EA for GBPUSD H1 timeframe

Yes -- that is an excellent idea and fits well with the overall design of the EA.

My "Ultron" EA for GBPUSD H1 timeframe

That's also approximately what I'm seeing. I have briefly experimented with lower time frames (e.g. M15) in the back tester and used optimizing to get the best settings -- and the EA appears to continue to work. But I did that just out of curiosity ...

My "Ultron" EA for GBPUSD H1 timeframe

How this EA works... I hope @Pawel doesn't mind if I point out an interesting feature of his Ultron EA. For its logic, this EA uses a few moving average calculations -- and that's it. There is nothing magical. However, what I find particularly ...

My "Ultron" EA for GBPUSD H1 timeframe

My response came across too harsh -- I apologize. This is an interesting EA -- extremely simple, yet it continues to back test well in the hands of many different people. However, it is still very much a work in progress -- and it seems that people ...

My "Ultron" EA for GBPUSD H1 timeframe

If you were to run a GBPUSD back test then you'd see that is the correct behavior. It's not that difficult -- the tools are at your disposal. It's not a money machine -- it's an algebraic formula that looks for patterns in a series of bars. If the ...

My "Ultron" EA for GBPUSD H1 timeframe

Why not test it yourself and then let the rest of know what you find?

My "Ultron" EA for GBPUSD H1 timeframe

We are all students here. This is not a professional product. You need to be your own guide...

My "Ultron" EA for GBPUSD H1 timeframe

Nice -- thanks for sharing the test results. Not only does it show this EA is capable of working well with pairs other than just GBPUSD, but it also shows the benefit of trading a portfolio of strategies. The portfolio chart is much smoother and the ...

My "Ultron" EA for GBPUSD H1 timeframe

For any particular symbol and time frame there is no single setting that is best. When using MT4's optimizing feature in Strategy Tester you get hundreds of results, and you have to pick and choose from many possible (and similar) candidates. It is ...

My "Ultron" EA for GBPUSD H1 timeframe