import numpy as np
import pandas as pd

def calculate_rsi(data, periods=14):
    """Calculate Relative Strength Index"""
    delta = data['Close'].diff()
    gain = (delta.where(delta > 0, 0)).rolling(window=periods).mean()
    loss = (-delta.where(delta < 0, 0)).rolling(window=periods).mean()
    rs = gain / loss
    return 100 - (100 / (1 + rs))

def calculate_macd(data):
    """Calculate MACD"""
    exp1 = data['Close'].ewm(span=12, adjust=False).mean()
    exp2 = data['Close'].ewm(span=26, adjust=False).mean()
    macd = exp1 - exp2
    signal = macd.ewm(span=9, adjust=False).mean()
    return macd, signal

def calculate_bollinger_bands(data, window=20):
    """Calculate Bollinger Bands"""
    sma = data['Close'].rolling(window=window).mean()
    std = data['Close'].rolling(window=window).std()
    upper_band = sma + (std * 2)
    lower_band = sma - (std * 2)
    return upper_band, sma, lower_band

def calculate_support_resistance(data, window=20):
    """Calculate Support and Resistance levels"""
    high_rolling = data['High'].rolling(window=window).max()
    low_rolling = data['Low'].rolling(window=window).min()
    return low_rolling, high_rolling