Create a multi-symbol indicator scanner that screens stocks by technical conditions. Arguments Parse $ARGUMENTS as: scan-type watchlist $0 = scan type (e.g., rsi-oversold, rsi-overbought, ema-crossover, supertrend-buy, supertrend-sell, macd-crossover, adx-trending, custom). Default: rsi-oversold $1 = watchlist (e.g., nifty50, banknifty, custom). Default: nifty50 If no arguments, ask the user what they want to scan for. Instructions Read the indicator-expert rules for reference Create scanners/{scan_type}/ directory (on-demand) Create {scan_type}_scanner.py The script must: Load .env from project root Define the watchlist (predefined or custom) Fetch data for each symbol via client.history() Compute indicator(s) using openalgo.ta Check the scan condition Print results as a formatted table Save results to CSV Optionally get real-time LTP via client.quotes() for current values Scan Logic Pattern results = [ ] for symbol in watchlist : df = fetch_data ( symbol , exchange , interval ) close = df [ "close" ]

Compute indicator

rsi

ta . rsi ( close , 14 ) current_rsi = rsi . iloc [ - 1 ]

Check condition

if current_rsi < 30 :

RSI oversold

results . append ( { "symbol" : symbol , "ltp" : close . iloc [ - 1 ] , "rsi" : current_rsi , "signal" : "OVERSOLD" , } )

Print table

df_results

pd . DataFrame ( results ) print ( df_results . to_string ( index = False ) ) df_results . to_csv ( script_dir / f" { scan_type } _results.csv" , index = False ) Predefined Scan Types Scan Type Condition Indicator rsi-oversold RSI(14) < 30 RSI rsi-overbought RSI(14) > 70 RSI ema-crossover EMA(10) crossed above EMA(20) in last 3 bars EMA ema-crossunder EMA(10) crossed below EMA(20) in last 3 bars EMA supertrend-buy Supertrend direction changed to -1 (uptrend) Supertrend supertrend-sell Supertrend direction changed to 1 (downtrend) Supertrend macd-crossover MACD crossed above Signal in last 3 bars MACD adx-trending ADX > 25 (strong trend) ADX bb-squeeze Bollinger Width at 20-bar low (volatility squeeze) Bollinger volume-spike Volume > 2x 20-day average Volume custom Ask user for conditions Any Predefined Watchlists NIFTY 50 (nifty50) NIFTY50 = [ "ADANIENT" , "ADANIPORTS" , "APOLLOHOSP" , "ASIANPAINT" , "AXISBANK" , "BAJAJ-AUTO" , "BAJFINANCE" , "BAJAJFINSV" , "BPCL" , "BHARTIARTL" , "BRITANNIA" , "CIPLA" , "COALINDIA" , "DIVISLAB" , "DRREDDY" , "EICHERMOT" , "GRASIM" , "HCLTECH" , "HDFCBANK" , "HDFCLIFE" , "HEROMOTOCO" , "HINDALCO" , "HINDUNILVR" , "ICICIBANK" , "INDUSINDBK" , "INFY" , "ITC" , "JSWSTEEL" , "KOTAKBANK" , "LT" , "M&M" , "MARUTI" , "NESTLEIND" , "NTPC" , "ONGC" , "POWERGRID" , "RELIANCE" , "SBILIFE" , "SBIN" , "SUNPHARMA" , "TCS" , "TATACONSUM" , "TATAMOTORS" , "TATASTEEL" , "TECHM" , "TITAN" , "ULTRACEMCO" , "UPL" , "WIPRO" , ] Bank NIFTY (banknifty) BANKNIFTY = [ "HDFCBANK" , "ICICIBANK" , "KOTAKBANK" , "AXISBANK" , "SBIN" , "INDUSINDBK" , "BANKBARODA" , "FEDERALBNK" , "PNB" , "IDFCFIRSTB" , "BANDHANBNK" , "AUBANK" , ] Output Format Symbol LTP RSI(14) Signal ------ --- ------- ------ SBIN 769.60 28.4 OVERSOLD TATASTEEL 142.30 25.1 OVERSOLD COALINDIA 385.00 29.7 OVERSOLD Scan: RSI Oversold (<30) | Watchlist: NIFTY 50 | Date: 2025-02-28 Found 3 / 50 symbols matching condition Results saved to: scanners/rsi_oversold/rsi_oversold_results.csv Example Usage /indicator-scanner rsi-oversold nifty50 /indicator-scanner ema-crossover banknifty /indicator-scanner supertrend-buy nifty50 /indicator-scanner volume-spike nifty50 /indicator-scanner custom