calculations.py

import requests


"""
other possible urls:
api.binance.com
api1.binance.com
api2.binance.com
"""
API_URL = 'https://api3.binance.com/api/v3/avgPrice'


def get_price(coin: str) -> float:
    """
    :param coin: token name, e.g. BTC for Bitcoin, LTC for Litecoin
    :return: coin's current price in stable USDT. 1USDT ~ 1$ USA
    """
    data = {'symbol': f'{coin}USDT'}  # e.g. BTCUSDT
    response = requests.get(API_URL, data)
    return float(response.json()['price'])


def count_profit(coin: dict, current_price: float) -> float:
    """
    :param coin: e.g.:
         {"amount": 1.4466,
          "buy_price": 200,
          "desired_sell_price": 219,
          "last_five_prices":  [201.4, 205, 203, 211, 222.2],
          "desired_price_fall":  10}
    :param current_price: coin's current price in stable USDT. 1USDT ~ 1$ USA
    :return: profit in USDT
    """
    # Example: (220 - 200) * 0.5 == 10
    return round((current_price - coin['buy_price']) * coin['amount'], 2)


def count_price_fall(coin: dict, current_price: float) -> float:
    """
    :param coin: same as in count_profit()
    :param current_price: same as in count_profit()
    :return: max diff between last 5 prices and current price, in USDT
    """
    # Example: max([201.4, 205, 203, 211, 222.2]) - 190 == 32.2
    try:
        return max(coin['last_five_prices']) - current_price
    except:
        # may happens if coin['last_five_prices'] is empty
        return 0


def should_i_buy(price_fall: float, desired_fall: float, current_price: float) -> bool:
    """
    :param price_fall: output of count_price_fall()
    :param desired_fall: desired price fall in PERCENTS! not in USDT. e.g. 10%
    :param current_price: coin's current price in stable USDT
    :return: True if you should buy, False otherwise
    """
    # Example: 21 / 200 * 100 == 10.5% and 10.5 >= 10, so -> True
    if price_fall / current_price * 100 >= desired_fall:
        return True
    return False

cryptobot.py

import time
import json
from telegram.ext import Updater, CommandHandler
# https://python-telegram-bot.readthedocs.io/en/stable/telegram.html
from calculations import get_price, count_profit, count_price_fall, should_i_buy


TOKEN = 'INSERT_YOUR_TOKEN_HERE'


def make_money(update, context):
    chat_id = update.effective_chat.id

    while True:
        with open('my_cryptocoins.json', 'r') as my_coins_data:
            my_coins = json.loads(my_coins_data.read())

        final_message = []

        for coin_name in my_coins.keys():
            coin = my_coins[coin_name]
            coin_price = get_price(coin_name)

            possible_profit = count_profit(coin, coin_price)
            price_fall = count_price_fall(coin, coin_price)
            last_prices = coin['last_prices']

            if len(last_prices) <= 60:
                last_prices.append(coin_price)
                if len(last_prices) <= 59:
                    price_fall = 0
                    # not enough data to provide correct calculations
            else:
                last_prices = last_prices[1:] + [coin_price]

            my_coins[coin_name]['last_prices'] = last_prices
            message = ''

            if coin_price >= coin['desired_sell_price'] and coin['amount'] > 0:
                message += f'{coin_name} --> TIME TO SELL\n'
                message += f'possible profit = {possible_profit}$'
            else:
                if should_i_buy(price_fall, coin['desired_price_fall'], coin_price):
                    message += f'{coin_name} --> TIME TO BUY\n'
                    message += f'price fall = {round(price_fall / coin_price * 100, 1)}%'
                else:
                    message += f'{coin_name} --> nothing to do right now...'

            final_message.append(message)
            time.sleep(2)

        with open('my_cryptocoins.json', 'w') as my_coins_data:
            my_coins_data.write(json.dumps(my_coins, sort_keys=True, indent=2))

        context.bot.send_message(chat_id=chat_id, text='\n'.join(final_message))

        time.sleep(60)  # run every minute


def main():
    updater = Updater(token=TOKEN, use_context=True)
    dp = updater.dispatcher
    dp.add_handler(CommandHandler('make_money', make_money))
    updater.start_polling()
    updater.idle()


if __name__ == '__main__':
    main()

my_cryptocoins.json

{
  "ALICE": {
    "amount": 0,
    "buy_price": 38,
    "desired_price_fall": 5,
    "desired_sell_price": 44.4,
    "last_prices": [
      12.71004841,
      12.71728863,
      12.71983559,
      12.73806222,
      12.74204871
    ]
  },
  "ARDR": {
    "amount": 0,
    "buy_price": 0.35657,
    "desired_price_fall": 5,
    "desired_sell_price": 0.385,
    "last_prices": [
      0.69192631,
      0.69205345,
      0.68947941,
      0.68280223,
      0.67819879
    ]
  },
  "BCH": {
    "amount": 0,
    "buy_price": 650,
    "desired_price_fall": 5,
    "desired_sell_price": 750,
    "last_prices": [
      628.07961283,
      628.60812333,
      629.01582194,
      629.29318231,
      629.12820048,
      660.64513681
    ]
  },
  "CHZ": {
    "amount": 345.6,
    "buy_price": 0.43935,
    "desired_price_fall": 5,
    "desired_sell_price": 0.525,
    "last_prices": [
      0.47372701,
      0.47399699,
      0.47404154,
      0.47423784,
      0.4743948,
      0.47480966,
      0.47488213,
      0.47454167,
      0.47440684,
      0.47416734,
      0.47402859,
      0.47364201,
      0.47320798,
      0.473166,
      0.47306656,
      0.47329848,
      0.47325571,
      0.47322269,
      0.47318959,
      0.47320587,
      0.47330456,
      0.47334745,
      0.47312584,
      0.47295299,
      0.47272819,
      0.47260858,
      0.47237592,
      0.47236715,
      0.47269164,
      0.47303713,
      0.47321989,
      0.47321752,
      0.47305879,
      0.47298299,
      0.47189559,
      0.47143374,
      0.47103156,
      0.47071662,
      0.46992494,
      0.4696435,
      0.4695788,
      0.46941569,
      0.46953848,
      0.46941545,
      0.46925208,
      0.46908322,
      0.46866076,
      0.46842141,
      0.46819481,
      0.46808106,
      0.46834739,
      0.46862408,
      0.46877851,
      0.46883275,
      0.46898339,
      0.46960723,
      0.47049429,
      0.47100322,
      0.47140227,
      0.47116174,
      0.47096054
    ]
  },
  "DOT": {
    "amount": 2.47,
    "buy_price": 40.65,
    "desired_price_fall": 5,
    "desired_sell_price": 44.44,
    "last_prices": [
      40.59707343,
      40.60759453,
      40.62486944,
      40.66087333,
      40.70293227,
      40.72148372,
      40.74692746,
      40.78215639,
      40.80679528,
      40.84112786,
      40.85074101,
      40.84543538,
      40.8321324,
      40.80070412,
      40.8132425,
      40.8424596,
      40.88214062,
      40.95977301,
      41.01259554,
      41.05039603,
      41.08479031,
      41.10728636,
      41.10719815,
      41.09407156,
      41.07555888,
      41.03898577,
      41.01090213,
      41.00284393,
      40.96449067,
      40.93678703,
      40.93800652,
      40.93664171,
      40.9316184,
      40.93327836,
      42.33760575,
      42.32814433,
      42.32327887,
      42.28516575,
      42.24177476,
      42.22444765,
      42.21106597,
      42.18999788,
      42.16848019,
      42.16191566,
      42.1373609,
      42.11165695,
      42.10106004,
      42.07728763,
      42.07073835,
      42.06635536,
      42.05983837,
      42.06763649,
      42.09329441,
      42.10433151,
      42.10416508,
      42.10535895,
      42.10116383,
      42.12940523,
      42.14840714,
      42.14704743,
      42.14707188
    ]
  },
  "EOS": {
    "amount": 33.98,
    "buy_price": 6.2202,
    "desired_price_fall": 5,
    "desired_sell_price": 6.66,
    "last_prices": [
      6.18960397,
      6.19024069,
      6.19151979,
      6.19584598,
      6.2004835,
      6.20997308,
      6.2132434,
      6.21895638,
      6.22274377,
      6.22509695,
      6.22413178,
      6.22155621,
      6.21689108,
      6.20973185,
      6.20718744,
      6.20641556,
      6.21103663,
      6.21566096,
      6.21604428,
      6.21560666,
      6.21404783,
      6.21129971,
      6.20917954,
      6.20049126,
      6.19492617,
      6.18992898,
      6.18824076,
      6.1883058,
      6.18548708,
      6.18684329,
      6.18947857,
      6.19180148,
      6.19336537,
      6.19681152,
      6.37600216,
      6.38238043,
      6.39174511,
      6.39508228,
      6.4042308,
      6.41233341,
      6.42429301,
      6.43021998,
      6.43075966,
      6.42990664,
      6.42643805,
      6.42771966,
      6.4235438,
      6.41616051,
      6.40657908,
      6.40269485,
      6.39911374,
      6.39979996,
      6.39971797,
      6.39831004,
      6.39414447,
      6.3933325,
      6.39749828,
      6.39978086,
      6.40653359,
      6.40735853,
      6.40220942
    ]
  },
  "LINK": {
    "amount": 3.16,
    "buy_price": 31.6424,
    "desired_price_fall": 5,
    "desired_sell_price": 34.45,
    "last_prices": [
      31.5036039,
      31.51282683,
      31.5224485,
      31.52983563,
      31.54114078,
      31.55026523,
      31.56489275,
      31.57938985,
      31.60062222,
      31.60269155,
      31.60821898,
      31.61374471,
      31.59018186,
      31.5805574,
      31.57169725,
      31.56919259,
      31.58333892,
      31.60281081,
      31.60221433,
      31.60556279,
      31.60587026,
      31.60864604,
      31.62651557,
      31.62076356,
      31.62105937,
      31.6205996,
      31.59811239,
      31.62959425,
      31.64048122,
      31.65598457,
      31.67118363,
      31.68532582,
      31.67997785,
      31.68350938,
      32.73603403,
      32.71808411,
      32.70273699,
      32.69037089,
      32.65555152,
      32.63557058,
      32.62077328,
      32.60613716,
      32.60008117,
      32.59975446,
      32.58797578,
      32.55634939,
      32.52355158,
      32.51699348,
      32.5001376,
      32.4933562,
      32.49272596,
      32.50221073,
      32.51416628,
      32.50396069,
      32.49574317,
      32.48808872,
      32.48819037,
      32.50838219,
      32.51811969,
      32.52172111,
      32.53073008
    ]
  },
  "LTC": {
    "amount": 0,
    "buy_price": 200,
    "desired_price_fall": 5,
    "desired_sell_price": 250,
    "last_prices": [
      219.86489156,
      219.89392475,
      219.96408683,
      220.07773126,
      220.27194868,
      220.41463508,
      220.71482046,
      220.91043112,
      220.99349824,
      221.06806428,
      221.05869042,
      220.93096444,
      220.83634253,
      220.76612093,
      220.7241666,
      220.78963412,
      220.86807305,
      220.87564486,
      220.84655221,
      220.84057134,
      220.86163973,
      220.88509074,
      220.81364965,
      220.56980768,
      220.4641237,
      220.24649026,
      220.12137339,
      219.99724436,
      219.9371435,
      220.05278457,
      220.12490445,
      220.15094832,
      220.19264215,
      220.36761952,
      233.54048246,
      233.35964016,
      233.23391109,
      233.13663933,
      233.11602344,
      233.10547839,
      233.01892178,
      232.69250166,
      232.44335262,
      232.33106257,
      232.11660744,
      231.95184585,
      231.65753056,
      231.5158513,
      231.5050244,
      231.47576463,
      231.46171649,
      231.48068523,
      231.49626282,
      231.48989635,
      231.40849146,
      231.3635276,
      231.638959,
      231.76794331,
      232.04061865,
      232.15560443,
      232.23692582
    ]
  },
  "MATIC": {
    "amount": 293.96,
    "buy_price": 0.35,
    "desired_price_fall": 5,
    "desired_sell_price": 0.385,
    "last_prices": [
      0.36345784,
      0.36356949,
      0.36408799,
      0.36455101,
      0.36515641,
      0.36541472,
      0.36561146,
      0.36565267,
      0.36583102,
      0.3659081,
      0.36601495,
      0.36603398,
      0.36574679,
      0.36555669,
      0.36578754,
      0.36592325,
      0.36593593,
      0.36578102,
      0.36547231,
      0.3653709,
      0.36539453,
      0.36562691,
      0.36569135,
      0.36587162,
      0.36583213,
      0.36559482,
      0.36538461,
      0.36604021,
      0.36629961,
      0.36708592,
      0.36802762,
      0.36939981,
      0.36991533,
      0.37013589,
      0.36530999,
      0.36533721,
      0.36529329,
      0.36511802,
      0.36481519,
      0.3636809,
      0.36315293,
      0.36292036,
      0.36258649,
      0.36258951,
      0.36250484,
      0.36239916,
      0.3622357,
      0.36192012,
      0.36178695,
      0.36184698,
      0.36191936,
      0.36214734,
      0.36253149,
      0.36287772,
      0.36307014,
      0.36331815,
      0.36343468,
      0.36350615,
      0.36369092,
      0.36388953,
      0.36415388
    ]
  }
}