chart-ema-rsi
Renders a JPG chart of a ticker's daily candles with EMA 9/20 lines, their golden/death crossovers marked, and an RSI 14 panel with 70/30 bands. Use when the user asks for a chart, candle plot, EMA cr
SKILL.md.claude/skills/chart-ema-rsi/SKILL.md
GitHubChart: EMA crossover and RSI
Daily candles from Yahoo with EMA(fast) and EMA(slow) over the price, a green ▲ under the candle of each golden cross (fast crosses above slow) and a red ▼ over each death cross, and RSI in a lower panel with 70/30 lines. Extra history is downloaded before the window, so the lines are settled from the first plotted bar.
Instructions
uv run python scripts/chart.py SYMBOL [--period 6mo] [--fast 9] [--slow 20] [--rsi 14] [--output PATH]
Show the user the image after it's written.
Arguments
SYMBOL- Ticker--period- Plotted window:1mo,3mo,6mo(default),1y,2y--fast/--slow- EMA lengths (default 9 / 20); fast must be shorter--rsi- RSI length (default 14)--output- JPG path (defaultsandbox/<SYMBOL>_ema_rsi_YYYY-MM-DD_HHmm.jpg)
Output
JSON: symbol, path, period, last_date, close, ema_fast_length, ema_slow_length,
ema_fast, ema_slow, trend (bullish when fast is above slow), rsi, crossovers
(date, type golden/death, ema_fast at the cross) inside the window, generated_at,
data_delay; or error.
During market hours the last candle is today's partial bar.