Streams every candle of an OHLCV CSV through a basket of indicators
(SMA, EMA, RSI, MACD, Bollinger, ATR, ADX, OBV) via the WebAssembly
bindings and prints a per-series summary. The browser counterpart of
examples/python/backtest.py,
examples/node/backtest.js and
examples/rust/src/bin/backtest.rs.