RuneCapital is a market analysis website for the game Old School Runescape.

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Features

Anomaly Detection	RuneCapital's home page uses a custom blend of Z-scoring and heuristics to flag the best items to trade at any given moment.
High-Res Price History	RuneCapital shows higher resolution data than most other flipping sites, and allows you to see the past 30 days of data in full detail.
Detailed Item Pages	Item pages include full historic data for the item, price trends by time of day + day of the week, and correlated items (if there are matches).
Browseable Table of Items	Looking for fresh item ideas? RuneCapital offers a table of all GE-tradeable items in OSRS, sorted by average daily GP volume.
Item Comparison Charts	You can track multiple items on the same chart, apply linear scaling to them, and save your settings for quick reference.
All-In-One Favorites View	RuneCapital lets you see charts of your favorite items all on one page, so you can quickly scan for the info that matters to you and pick up on surprise opportunities.

Why RuneCapital?

It's time to hop on a soapbox. Most OSRS flipping websites aren't showing you real prices.

That may come as a shock – but I promise, it's true. What they are showing instead are price aggregates. In plain English, they're showing you snapshots of the average price over some interval like 5 minutes, an hour, or if you zoom out enough, a whole day.

Why do they do this? Well, for looking at long-term trends, the minute-by-minute granular data is overkill. You don't need to see every single datapoint to get the big picture. It can make sense to aggregate when you're looking at more than a few days of data at a time, yet many flipping sites still use aggregates for all their price charts... How come?

The answer has to do with how the Wiki Realtime API, source of all high-quality OSRS market data, shares its data. The Wiki's data comes in three primary forms:

• /latest, which reflects latest real prices paid for an item, and is updated every minute
• /5m, which gives you the average high & low price of items plus the volume traded for a 5-minute window
• /timeseries, which gives you average high & low price plus volume traded over time for a single item

Subtle yet crucial detail buried in there: the only source of data that gives true price points is /latest - and you can only get the last minute of data. There is no way to look up old values. If you're making a flipping site, that means you have to fetch /latest data every minute, store it yourself, and send it out to users yourself.

⚠ None of this is intended as criticism of the Wiki's API design. To the contrary, the design is optimized well for common use-cases, generally pleasant to use, and has had exceptional uptime. This site wouldn't be possible without the Wiki team. My goal is only to explain why most sites are following the path of least resistance. ⚠

To avoid the complications of recording and relaying the realtime data to all users themselves, many flipping sites instead opt to have users' browsers fetch price history directly from the Wiki API. The site's code then runs locally in the users' browsers to process and display the data for them.

There are big advantages to this: the flipping site doesn't have to keep their own database of price histories, the flipping site's server doesn't spend resources to send out its own price history data, and new updates from the API are available instantly to users.

The one big, glaring disadvantage? The only way that historic data can be pulled from the wiki is in averaged form (usually from /timeseries).

Hence, most OSRS flipping websites aren't showing you real prices. I started working on RuneCapital because I was annoyed that no one else at the time was using the /latest data for charts.

Roadmap

Just gonna TL;DR it as much as possible.

• RuneCapital is kinda expensive to run, since it's data intensive.
• I'm presently paying out-of-pocket for server costs.
• The server can probably handle ~10-20 simultaneous users comfortably right now.
• When the server starts showing performance issues, I will pause new user registrations.
• All features available at launch will remain free forever.
• I've built a "LiveLoad" integration plugin for Runelite. When you view an item in-game through the Grand Exchange's buy/sell interface, it can instantly & automatically forward RuneCapital tabs in your browser to the item page.
• I might make "LiveLoading" a paid feature to cover server costs. Alternatively, I might run RuneCapital off a crappy computer in a closet.
• If you try RuneCapital, like it, and are willing to sponsor the server costs, please get in touch.

Contact

For questions, comments, bug reports, media inquiries, and cat photos, please email billy@rune.capital.