Thanks! This tool focuses specifically on Price Action style daytrading. For algotrading there are many other tools that are way better suited for this task.
Thank you very much! I don't see the feedback as negative, as what I've seen so far has been 95% overwhelmingly positive. My thesis has proven true - this tool is helping people. While HN might not be the most appropriate audience, I'm still grateful for the comments made here. Always good to see things from different perspective.
As for your points:
1) Trading is a game of probabilities and risk management. None of the best traders I know are trying to predict anything. They are merely reacting to situations where they have calculated advantage. They know their edge, they know their odds, and they are placing their bets when it's skewed in their favor.
2) For most retail trading styles and portfolio sizes, real trades will have an impact, but not significant enough for it to worry about too much. Unless asset your're trading is really illiquid.
People who strongly believe in EMH are usually theorists. There are way too many people who's practical track record is way too good to be attributed to chance. I believe markets are random most of the time, but there are moments when they are not. That's where the best traders place their bets.
To simplify - when you long, you bet on price going up. When you short, you bet on price going down. If you went short and price dropped 5%, your profit is 5% (minus commission, slippage, and some other stuff).
I've been doing a fair bit of promotion and marketing, because "you build it and they will come" rarely works, even if your stuff is good. But I'm sure any dev who has launched anything already knows that.
I posted this here with close to 0 expectations, because my posts in HN usually don't get much attention. If you've seen this on Reddit, you should know it was very well received in multiple subs, so getting a bit more than 20 upvotes here wouldn't be something out of the ordinary.
The rank of the post got affected by the flamewar detector, not because of voting abnormality.
Please don't break the HN guidelines by insinuating this kind of thing without evidence—they're quite explicit about that (https://news.ycombinator.com/newsguidelines.html), for good reason because most such insinuations are just pure perception. The internet is a bit Rohrshcach diagram that way.
If you're worried about vote manipulation, that doesn't mean you should do nothing! But what you should do is email hn@ycombinator.com so we can investigate. We always do.
Your post got like 30 upvotes in 30 minutes (paid for) which made it rocket up to the front page. The HN mod team then manually removed it from the front page due to vote manipulation. Notice how after your paid votes ran out nobody else gave it many more additional votes - still hovering around 30.
Does it really impact your practicing experience that significantly? This is an abstraction over market, it also doesn't have slippage and hundred other things.
Anyway, size is on the feature list, will be added in following weeks.
If averaging down is the key to your daytrading strategy, I suggest you rethink your strategy. There is a good saying - "never add to a losing position".
Patterns are an oldschool Technical Analysis fallacy that blindly believes that X means up and Y down. More practical and successful approaches (Price Action) focus on statistical significance and recognizing market context and supply/demand imbalances.
Self-fulfilling prophecy is not a real thing - take any chart and you can find 10 patterns that say up and 10 that say down. Big players move the markets and they don't use retail trader Technical Analysis patterns.
It's all about price and price action. A lot of trading styles don't require much history and don't care about the news - it's all calculated in before you know. A lot of traders believe price reflects all you need to know - everything else is just noise.
