def ema_checks(stats: HourData, history: History, ema_threshold: float,
reset_perc: float):
if stats.ema_percent_diff_positive > ema_threshold:
logging.info(
f"Current price is outside threshold difference ({stats.formatted_info()})"
)
return False
logging.info(
f"Current price not outside threshold ({stats.formatted_info()})")
# If EMA hasn't been reset then check whether we should reset it
if not history.ema_reset:
if history.rising:
target = history.price * (1 - reset_perc / 100)
should_reset = stats.ema > target
else:
target = history.price * (1 + reset_perc / 100)
should_reset = stats.ema < target
if should_reset:
logging.info("Resetting EMA")
history.ema_reset = True
history.save()
return True
cb = Coinbase(Currencies.default(), args.interval)
prices = cb.price_list()
cur_price = prices[0]
# Get history from last runs, use it to work out what test to make
history = History(DATA_FILE)
# Get stats from coinbase data
# If change isn't large enough, then update history and exit
stats = HourData(prices, EMA_NUM_HOURS)
if Analysis.ema_checks(stats, history, EMA_THRESHOLD_PERCENT,
EMA_RESET_PERCENT):
sys.exit(1)
if not Analysis.should_post(history, stats, prices, EMA_THRESHOLD_PERCENT):
sys.exit(1)
logging.info("Message should be posted, generating attachment")
attachments = Slack.generate_post(prices, stats, Currencies.default())
image_url = SlackImages.get_image(stats.is_diff_positive)
logging.info("Posting to slack")
Slack.post_to_slack(BOT_NAME, image_url, "", attachments, SLACK_URL,
SLACK_CHANNEL)
history.price = stats.cur_price
history.rising = stats.is_diff_positive
history.ema_reset = False
history.save()
logging.info("Done")