BlockViz: free crypto visualizations + portfolio tools I built. Feedback?

[blockviz]

Hey Bitcointalk members,

I’ve been building a free-to-use crypto analytics site called BlockViz. It started as a "I think there is a gap between simple CMC-sparklines and a pure TradingView Candle Chart", and it’s turned into a small toolbox that I keep adding to.

Link: https://blockviz.xyz

I’m posting here mainly to find out:
- Do these tools look useful to you, or if not, why not?
- What should I build next, and what do you wish existed / consider valuable?

What’s on BlockViz right now (high level)
Price tools
• Technical analysis chart (candles/line, log/linear, indicators like SMA/EMA/BB/RSI/MACD)
• Indexed comparison (normalize two assets to 100 so you can compare performance properly)
• Best/worst days heatmap (see how much returns depend on a handful of days)
• Seasonality heatmap (monthly and quarterly returns across years)

Market cap tools
• Dominance (share of total market, a category, or your own basket)
• Market cap development (absolute vs percent share views)
• Treemap (coins or categories, absolute or change view)

Portfolio tools
• Portfolio tracker (holdings + cost basis, allocation, unrealized PnL)
• Portfolio development (value and allocation over time)
• Portfolio comparison (compare real portfolios and model allocations like 80% BTC 20% ETH, indexed to 100)

Simulators
• Market cap parity (what if X matched Y’s market cap)
• HODL vs DCA
• Coin flip (switch coin A to coin B at start, compare vs holding)
• Sell and buy back (trim, sit in cash, re-enter later)
• Stop loss (fixed and trailing)

There’s more in the menu, but those are the main ones.

What I’d love feedback on
- If you clicked around for a few minutes, what felt immediately useful and what felt pointless?
- Any tools you personally use elsewhere that you wish were done cleaner or faster?

Looking forward:
Right now the tool is free and I’m not trying to sell anything. But paying the price data provider and hosting the database and simulations are already costing me money, so I’m curious:
• If I added a paid tier later, what would actually consider worth paying for? Examples: saved layouts/indicator sets, more portfolios, price/trading signal alerts, CSV exports, more history, ... that kind of thing.
• Or would you rather see donations / ads. I personally hate ads, so I am trying to avoid that route...

If you’ve got strong opinions either way, I’m all ears, looking forward to them  

Thanks for taking a look, and feel free to be blunt. Bugs, feature requests, “this sucks”, all welcome!

[OmegaStarScream]

I'm not really much of a trader, so I cannot comment on everything, but the porfolio tracker is something that needs more work. Right now, this doesn't look any different from CMC for example. What you want, is proper tracking like Delta app for example.
You want to give the user the ability to import addresses, master public keys (to watch all of the wallet), API keys from exchanges (read-only keys otherwise no one would trust your site), etc. Basically all the needed things to help the user have his portfolio in one page without having to write the numbers himself. Everything should be pulled automatically.

[blockviz]

porfolio tracker is something that needs more work

Thanks for the quick reply. I would say regarding Portfolio Tracker, yes, CMC offers something similar, but a bit less interactive (e.g. no cross filtering), also no bar charts for quick visual performance cues across multiple timeframes at one glance.
What visualization would you like to have added for the Portfolio Tracker?

Differentiation for Portfolio is definitely the Comparison feature. This CMC does not have (and as far as I found also nobody else...).
i.e. you can compare your portfolios among each other but also against standard Model Portfolios. i.e. Benchmark it. Is your custom effort even working...

Regarding data import: yes, this is something I have already thought about, but would definitely be a bigger effort as it is so heterogenous (different Block Explorers so many different exchanges with different CSV export formats...) But I agree, it would be super nice.
Maybe the industry could agree on a standard format... that would be helpful

[BattleDog]

I agree with the direction here... the "comparison / benchmark" angle is the part that can actually make this feel like more than another CMC skin. But the portfolio tracker itself has to become mostly zero-effort or people will bounce. Watch-only by default (addresses/xpubs), and if you add exchange support keep it read-only and make the UX scream "never paste private keys here" like it's a fire alarm.

On the messy CSV/explorer jungle: don't try to support everything on day one. Pick a couple of common sources, publish a dead-simple canonical CSV template, and let users map columns on import. If you nail a clean "bring your own data" pipeline and keep the charts fast, the rest can grow organically without you drowning in edge cases.