Sell all available bitcoin if price doubles in 7 days

sell_on_7day_double.py

# if bitcoin price on Bitstamp doubles within a 7-day timeframe, sell

from datetime import datetime as dt
from datetime import timedelta
import hashlib
import hmac
import json
from time import sleep
import requests


URL = 'https://www.bitstamp.net/api/'
seven_day_history = []

CLIENT_ID = 0
API_KEY = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
API_SECRET = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'


def get_nonce():
    return int((dt.utcnow() - dt(1970, 1, 1)).total_seconds())


def make_request(path=None, data=None):
    try:
        r = requests.post(URL+path, data)
        if r.status_code == requests.codes.ok:
            return json.loads(r.text)
        else:
            raise Exception('HTTP error: {}'.format(r.status_code))
    except Exception as e:
        print e

def make_private_request(path=None, parameters=None):
    nonce = get_nonce()
    message = '{}{}{}'.format(nonce, CLIENT_ID, API_KEY)
    signature = hmac.new(
        API_SECRET, msg=message, digestmod=hashlib.sha256).hexdigest().upper()

    data = {'key': API_KEY, 'signature': signature, 'nonce': nonce}
    if parameters: data.update(parameters)

    return make_request(path=path, data=data)


while 1:
    ticker = make_request(path='ticker/')
    now = dt.utcnow()

    # append time stamp and price of bitcoin to list
    seven_day_history.append((now, float(ticker['bid'])))

    # remove items older than 7 days
    for i in seven_day_history:
        if i[0] < now-timedelta(days=7):
            seven_day_history.remove(i)

    d1_price = seven_day_history[0][1]
    d7_price = seven_day_history[-1][1]

    # sell all available bitcoin if price doubled in last 7 days
    if d7_price >= d1_price*2:

        balance = make_private_request(path='balance/')
        xbt_available = balance['btc_available']

        # place limit order at price of highest bid
        sell = make_private_request(path='sell/',
                                    parameters={'amount': xbt_available,
                                                'price': d7_price})

        print '{}: Placed order id {} to sell {} XBT at {} each.'.format(
            sell['datetime'], sell['id'], sell['amount'], sell['price'])

    # sleep for 12 hours
    sleep(43200)