A Steem price watching bot written in Python!

My bot is named Steempy, and "he" will monitor the steem price 6 times a minute and if the price changes he will print out the difference in the console.

Steempy is still in version 0.0.2 and has a few bugs, like the change in price not displaying in a "pretty" way but, the logic behind Steempy is correct. That bug is the only one I could find so far! So give it a test and let me know what you think!

If you have any experience with displaying floats/decimals in Python in a pretty way, please comment your suggestions bellow. I tried the decimal module but, it didn't seem to help a whole lot.

Now for the code: Steempy.py:

# Steempy: a bot that monitors a CryptoCompare API  v0.0.2

# Bugs: having trouble with like 19 & line 24 displaying the change

# correctly.  Example: displays 2.0E-7 as a change.

from decimal import Decimal

import requests

import time

url = "https://min-api.cryptocompare.com/data/histominute?fsym=STEEM&tsym=BTC&limit=1&aggregate=0&e=CCCAGG"

coin_price = [0.0000001]

while True:

	minutechart = requests.get(url).json()

	print("Sleeping...")

	time.sleep(5)

	# list indexing from multiple nested lists/dicts

	a = minutechart['Data'][-1]['close']

	coin_price.append(a)

	b = coin_price[0]

	if a > b:

		diff = Decimal(a) - Decimal(b)

		print("a higher difference of {} BTC since last price".format(

					round(Decimal(diff),8)))

		coin_price.pop(0)

		print(a)

	elif a < b:

		diff = Decimal(b) - Decimal(a)

		print("a lower difference of {} BTC since last price".format(

					round(Decimal(diff),8)))

		coin_price.pop(0)

	else:

		coin_price.pop(0)

		print("Current Price: {} ".format(coin_price))

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