app.py

# %%
import gradio as gr
import pandas as pd
import yfinance as yf
from datetime import datetime
import plotly.graph_objects as go
import numpy as np

# Functions for calculating indicators (SMA, RSI, etc.) and generating trading signals

def calculate_sma(df, window):
    return df['Close'].rolling(window=window).mean()

def calculate_ema(df, window):
    return df['Close'].ewm(span=window, adjust=False).mean()


def calculate_macd(df):
    short_ema = df['Close'].ewm(span=12, adjust=False).mean()
    long_ema = df['Close'].ewm(span=26, adjust=False).mean()
    macd = short_ema - long_ema
    signal = macd.ewm(span=9, adjust=False).mean()
    return macd, signal


def calculate_rsi(df):
    delta = df['Close'].diff()
    gain = (delta.where(delta > 0, 0)).rolling(window=14).mean()
    loss = (-delta.where(delta < 0, 0)).rolling(window=14).mean()
    rs = gain / loss
    rsi = 100 - (100 / (1 + rs))
    return rsi

def calculate_bollinger_bands(df):
    middle_bb = df['Close'].rolling(window=20).mean()
    upper_bb = middle_bb + 2 * df['Close'].rolling(window=20).std()
    lower_bb = middle_bb - 2 * df['Close'].rolling(window=20).std()
    return middle_bb, upper_bb, lower_bb

def calculate_stochastic_oscillator(df):
    lowest_low = df['Low'].rolling(window=14).min()
    highest_high = df['High'].rolling(window=14).max()
    slowk = ((df['Close'] - lowest_low) / (highest_high - lowest_low)) * 100
    slowd = slowk.rolling(window=3).mean()
    return slowk, slowd



def calculate_cmf(df, window=20):
    mfv = ((df['Close'] - df['Low']) - (df['High'] - df['Close'])) / (df['High'] - df['Low']) * df['Volume']
    cmf = mfv.rolling(window=window).sum() / df['Volume'].rolling(window=window).sum()
    return cmf

def calculate_cci(df, window=20):
    """Calculate Commodity Channel Index (CCI)."""
    typical_price = (df['High'] + df['Low'] + df['Close']) / 3
    sma = typical_price.rolling(window=window).mean()
    mean_deviation = (typical_price - sma).abs().rolling(window=window).mean()
    cci = (typical_price - sma) / (0.015 * mean_deviation)
    return cci



def generate_trading_signals(df):
    # Calculate various indicators
    df['SMA_30'] = calculate_sma(df, 30)
    df['SMA_100'] = calculate_sma(df, 100)
    df['EMA_12'] = calculate_ema(df, 12)
    df['EMA_26'] = calculate_ema(df, 26)
    df['RSI'] = calculate_rsi(df)
    df['MiddleBB'], df['UpperBB'], df['LowerBB'] = calculate_bollinger_bands(df)
    df['SlowK'], df['SlowD'] = calculate_stochastic_oscillator(df)
    df['CMF'] = calculate_cmf(df)
    df['CCI'] = calculate_cci(df)

    

    # Generate trading signals
    df['SMA_Signal'] = np.where(df['SMA_30'] > df['SMA_100'], 1, 0)
    
    macd, signal = calculate_macd(df)
    df['MACD_Signal'] = np.select([(macd > signal) & (macd.shift(1) <= signal.shift(1)),
                                    (macd < signal) & (macd.shift(1) >= signal.shift(1))],[1, -1], default=0)


    
    df['RSI_Signal'] = np.where(df['RSI'] < 15, 1, 0)
    df['RSI_Signal'] = np.where(df['RSI'] > 100, -1, df['RSI_Signal'])
    
    df['BB_Signal'] = np.where(df['Close'] < df['LowerBB'], 0, 0)
    df['BB_Signal'] = np.where(df['Close'] > df['UpperBB'], -1, df['BB_Signal'])
    
    df['Stochastic_Signal'] = np.where((df['SlowK'] < 5) & (df['SlowD'] < 5), 1, 0)
    df['Stochastic_Signal'] = np.where((df['SlowK'] > 95) & (df['SlowD'] > 95), -1, df['Stochastic_Signal'])
    

    df['CMF_Signal'] = np.where(df['CMF'] > 0.5, -1, np.where(df['CMF'] < -0.5, 1, 0))

    
    df['CCI_Signal'] = np.where(df['CCI'] < -250, 1, 0)
    df['CCI_Signal'] = np.where(df['CCI'] > 250, -1, df['CCI_Signal'])
    


    # Combined signal for stronger buy/sell points
    df['Combined_Signal'] = df[['RSI_Signal', 'BB_Signal', 
                                  'Stochastic_Signal', 'CMF_Signal', 
                                  'CCI_Signal']].sum(axis=1)

    return df


# %%
def plot_combined_signals(df, ticker):
    # Create a figure
    fig = go.Figure()

    # Add closing price trace
    fig.add_trace(go.Scatter(
        x=df.index, y=df['Close'], 
        mode='lines', 
        name='Closing Price', 
        line=dict(color='lightcoral', width=2)
    ))

    # Add buy signals
    buy_signals = df[df['Combined_Signal'] >= 3]
    fig.add_trace(go.Scatter(
        x=buy_signals.index, y=buy_signals['Close'], 
        mode='markers', 
        marker=dict(symbol='triangle-up', size=10, color='lightgreen'), 
        name='Buy Signal'
    ))

    # Add sell signals
    sell_signals = df[df['Combined_Signal'] <= -3]
    fig.add_trace(go.Scatter(
        x=sell_signals.index, y=sell_signals['Close'], 
        mode='markers', 
        marker=dict(symbol='triangle-down', size=10, color='lightsalmon'), 
        name='Sell Signal'
    ))

    # Combined signal trace
    fig.add_trace(go.Scatter(
        x=df.index, y=df['Combined_Signal'], 
        mode='lines', 
        name='Combined Signal', 
        line=dict(color='deepskyblue', width=2), 
        yaxis='y2'
    ))

    # Update layout
    fig.update_layout(
        title=f'{ticker}: Stock Price and Combined Trading Signal (Last 60 Days)',
        xaxis=dict(title='Date'),
        yaxis=dict(title='Price', side='left'),
        yaxis2=dict(title='Combined Signal', overlaying='y', side='right', showgrid=False),
        plot_bgcolor='black',
        paper_bgcolor='black',
        font=dict(color='white')
    )

    return fig

# %%
def stock_analysis(ticker, start_date, end_date):
    # Download stock data from Yahoo Finance
    df = yf.download(ticker, start=start_date, end=end_date)
    
    # Generate signals
    generate_trading_signals(df)
    
    # Last 60 days
    df_last_60 = df.tail(60)
    
    # Plot signals
    fig_signals = plot_combined_signals(df_last_60, ticker)
    
    return fig_signals




# %%
def plot_individual_signals(df, ticker):
    # Create a figure
    fig = go.Figure()
    fig.add_trace(go.Scatter(
        x=df.index, y=df['Close'], 
        mode='lines', 
        name='Closing Price', 
        line=dict(color='lightcoral', width=2)
    ))

    # Add buy/sell signals for each indicator
    signal_names = ['RSI_Signal', 'BB_Signal', 
                    'Stochastic_Signal', 'CMF_Signal', 
                    'CCI_Signal']

    for signal in signal_names:
        buy_signals = df[df[signal] == 1]
        sell_signals = df[df[signal] == -1]
        
        fig.add_trace(go.Scatter(
            x=buy_signals.index, y=buy_signals['Close'], 
            mode='markers', 
            marker=dict(symbol='triangle-up', size=10, color='lightgreen'), 
            name=f'{signal} Buy Signal'
        ))

        fig.add_trace(go.Scatter(
            x=sell_signals.index, y=sell_signals['Close'], 
            mode='markers', 
            marker=dict(symbol='triangle-down', size=10, color='lightsalmon'), 
            name=f'{signal} Sell Signal'
        ))

    fig.update_layout(
        title=f'{ticker}: Individual Trading Signals',
        xaxis=dict(title='Date'),
        yaxis=dict(title='Price', side='left'),
        plot_bgcolor='black',
        paper_bgcolor='black',
        font=dict(color='white')
    )

    return fig


def display_signals(df):
    # Create a signals DataFrame
    signals_df = df[['Close', 'SMA_Signal', 'MACD_Signal', 'RSI_Signal', 
                      'BB_Signal', 'Stochastic_Signal', 
                      'CMF_Signal', 'CCI_Signal']].copy()

    # The Date is the index, so we don't need to add it as a column
    signals_df.index.name = 'Date'  # Name the index for better readability

    # Replace signal values with 'Buy', 'Sell', or 'Hold'
    for column in signals_df.columns:
        signals_df[column] = signals_df[column].replace(
            {1: 'Buy', -1: 'Sell', 0: 'Hold'}
        )

    return signals_df

def stock_analysis(ticker, start_date, end_date):
    # Download stock data from Yahoo Finance
    df = yf.download(ticker, start=start_date, end=end_date)

    # Generate signals
    df = generate_trading_signals(df)
    
    # Last 60 days for plotting
    df_last_60 = df.tail(200)

    # Plot combined signals
    fig_signals = plot_combined_signals(df_last_60, ticker)

    # Plot individual signals
    fig_individual_signals = plot_individual_signals(df_last_60, ticker)

    # Display signals DataFrame
    signals_df = df_last_60[['Close', 'SMA_Signal', 'MACD_Signal', 'RSI_Signal', 'BB_Signal', 
                              'Stochastic_Signal','CMF_Signal', 
                              'CCI_Signal']]

    return fig_signals, fig_individual_signals



# %%
# Define Gradio interface
with gr.Blocks() as demo:
    gr.Markdown("## Stock Market Analysis App")

    ticker_input = gr.Textbox(label="Enter Stock Ticker (e.g., AAPL, NVDA)", value="NVDA")
    start_date_input = gr.Textbox(label="Start Date (YYYY-MM-DD)", value="2022-01-01")
    end_date_input = gr.Textbox(label="End Date (YYYY-MM-DD)", value="2025-01-01")

    # Create a submit button that runs the stock analysis function
    button = gr.Button("Analyze Stock")
    
    # Outputs: Display results, charts
    combined_signals_output = gr.Plot(label="Combined Trading Signals")
    individual_signals_output = gr.Plot(label="Individual Trading Signals")
    #signals_df_output = gr.Dataframe(label="Buy/Sell Signals")

    # Link button to function
    button.click(stock_analysis, inputs=[ticker_input, start_date_input, end_date_input], 
                  outputs=[combined_signals_output, individual_signals_output])

# Launch the interface
demo.launch()