Create an interactive Plotly chart for a technical indicator on a symbol.

Arguments

Parse $ARGUMENTS as: indicator symbol exchange interval

• $0 = indicator name (e.g., ema, rsi, macd, supertrend, bbands, adx, stochastic, ichimoku, obv, vwap). Default: ema

• $1 = symbol (e.g., SBIN, RELIANCE, NIFTY, AAPL). Default: SBIN

• $2 = exchange (e.g., NSE, BSE, NFO, NSE_INDEX). Default: NSE. For US symbols use: YFINANCE

• $3 = interval (e.g., D, 1h, 5m). Default: D

If no arguments, ask the user which indicator and symbol they want.

Instructions

• Read the indicator-expert skill rules for reference patterns

• Create charts/{indicator_name}/ directory if it doesn't exist (on-demand)

• Create a .py file in charts/{indicator_name}/ named {symbol}_{indicator}_chart.py

• Use the matching template from rules/assets/{indicator}_chart/chart.py as starting point (if available)

• The script must:

• Load .env from project root using find_dotenv()

• Fetch data via OpenAlgo client.history() (or yfinance for US symbols)

• Normalize data: convert index to datetime, sort, strip timezone

• Compute the indicator using openalgo.ta

• Create a Plotly chart with template="plotly_dark" and xaxis_type="category"

• Overlay indicators (EMA, Bollinger, Supertrend, Ichimoku) go on the candlestick panel

• Subplot indicators (RSI, MACD, Stochastic, ADX, Volume, OBV) go below in separate panels

• Use make_subplots for multi-panel layouts

• Add horizontal reference lines where appropriate (RSI 30/70, Stochastic 20/80)

• Print a plain-language explanation of the current indicator reading

• Save chart as HTML: {symbol}_{indicator}_chart.html

• Show chart with fig.show()

• Never use icons/emojis in code or output

Indicator Chart Types

Overlay Indicators (on candlestick panel)

Indicator Chart Type

ema, sma, wma, dema, tema, hma Line overlay

bbands Fill-between bands + midline

supertrend Color-coded line (green=up, red=down)

ichimoku 5 lines + cloud fill

keltner, donchian Fill-between channels

sar Dot markers above/below price

ma-envelopes Upper/lower band lines

Subplot Indicators (separate panel below)

Indicator Chart Type

rsi Line + horizontal 30/70 zones

macd Line + signal + histogram bars

stochastic K% + D% lines + 20/80 zones

adx DI+, DI-, ADX lines + 25 threshold

cci Line + horizontal +100/-100 zones

williams_r Line + -20/-80 zones

obv Line (cumulative)

mfi Line + 20/80 zones

volume Bar chart (green/red by price direction)

atr Line (volatility)

Multi-Indicator Charts

If user asks for "multi" or multiple indicators, create a comprehensive multi-panel chart with:

• Row 1: Candlestick + EMA overlays

• Row 2: RSI(14)

• Row 3: MACD(12,26,9)

• Row 4: Volume bars

Signal Markers

If the indicator generates clear buy/sell signals (e.g., crossover, supertrend direction change), add triangle markers:

• Buy: green triangle-up markers

• Sell: red triangle-down markers

Data Periods

Interval Default Lookback

D 1 year (365 days)

1h 6 months (180 days)

15m, 30m 3 months (90 days)

5m 1 month (30 days)

1m 7 days

Plain-Language Explanation

After creating the chart, print a brief explanation:

SBIN — RSI(14) Analysis Current RSI: 42.3 Interpretation: Neutral zone (between 30-70). Neither overbought nor oversold. Trend: RSI has been declining from 65 over the past 5 bars, suggesting weakening momentum.

Example Usage

/indicator-chart ema SBIN NSE D

/indicator-chart rsi RELIANCE NSE D

/indicator-chart macd AAPL YFINANCE D

/indicator-chart supertrend NIFTY NSE_INDEX D

/indicator-chart multi SBIN NSE D

/indicator-chart bbands INFY NSE 1h