A support and resistence line sample

sr_matplotlib.py

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt

def supres_plot(df, support, resistence):
    
    for i in range(len(support)):
        print('Support line {0} is {1}'.format(i, support[i]))
        
    for i in range(len(resistence)):
        print('Resistence line {0} is {1}'.format(i, resistence[i]))
    
    fig, ax1 = plt.subplots(figsize=(15,10))
    
    color = 'tab:green'
    xdate = [x.date() for x in df.index]
    ax1.plot(xdate, df['Close'], label='close', color=color)
    ax1.plot(xdate, df['High'], label='high')
    ax1.plot(xdate, df['Low'], label='low')
    for sup in support:
        ax1.axhline(y=sup, linewidth='1.0', color='red')
    for res in resistence:
        ax1.axhline(y=res, linewidth='1.0', color='blue')
    ax1.legend()
    ax1.set_title(label='Support and resistence lines')
    plt.grid()
    plt.show()