// Downloaded From https://www.WiseStockTrader.com
function Beta( BaseSymbol, N )
{
    Chg = ROC( C, 1 );
    ChgBase = ROC( Foreign( BaseSymbol, "C" ), 1 );

    return ( N * Sum( Chg * ChgBase , N ) - Sum( Chg, N ) * Sum( ChgBase, N ) ) / ( N * Sum( ChgBase ^ 2 , N ) - Sum( ChgBase, N ) ^ 2 );
}

symbol = ParamStr( "Symbol", "70001247" );

Plot( Beta( symbol, Param( "Periods", 21, 2, 100 ) ), _DEFAULT_NAME(), ParamColor( "Color", ColorCycle ) );

Filter = 1;

AddTextColumn( FullName(), "FullName" );
AddColumn( Close, "Close", 1.2 );
AddColumn( Beta( "70001247", 50 ), "Beta", 1.2 ); //Replace 70001247 with your Nifty Symbol here