Stacked on #315 (the native Binance REST fetcher). Retarget to `main` once #315 merges.
Migrates the runnable examples off third-party data-I/O packages onto Wickra's
native data layer (`CandleReader`, `Resampler`, `BinanceFeed`, `fetch_*klines`).
## Third-party packages removed (the zero-dep selling point)
- **Node**: `ws` (live feed → BinanceFeed) — dropped from package.json + lockfile
- **Go**: `github.com/coder/websocket` — dropped from go.mod / go.sum (`go mod tidy`)
- **Java**: `jackson-databind` (live feed + REST fetch) — dropped from pom.xml
- **R**: `jsonlite` + `websocket` + `later` — dropped from the README notes
Each language's CSV loading now goes through `CandleReader`, manual resampling
through `Resampler`, the live feed through `BinanceFeed`, and (Java/R) the REST
download through the native fetcher.
## Verification
Ran the offline examples per language against the bundled data — backtest and
multi_timeframe produce identical output across Python / Node / Go / Java / R
(e.g. ATR(14) last 345.1010; 1h→5m resamples to 240 bars, →15m to 80 bars).
C# / C / WASM (stdlib-only, no third-party deps to remove) follow in this branch.
Note: the streaming `strategy_*` examples have pre-existing candle-indicator
runtime bugs (CI only syntax-smokes them); the CSV migration preserves their
shape and leaves those bugs for a separate fix.
Close the "multi-timeframe" cell of the cross-language matrix for WASM.
* examples/wasm/multi_timeframe.html — fetches the bundled 1-minute
BTCUSDT CSV (or any 1-minute OHLCV CSV), rolls it up in-page to 5m,
15m, 1h, 4h and 1d buckets, and prints RSI(14), MACD(12,26,9)
histogram and ADX(14) per timeframe via the WebAssembly bindings.
Same inline-bucket aggregation as the Node sibling, same indicator
set as the Python and Rust siblings — the Rust version uses
`wickra-data::Resampler` directly which is currently a Rust-only API.
The render is a single table (one row per timeframe) so the cross-
language outputs sit side-by-side cleanly. The inline module script
syntax-checks cleanly under `node --check`.
kingchenc