Refactoring crypto load

[jose-donato]

Problem:

• coingecko currently not being used (df from coingecko is replaced by yahoofinance)
• coingecko does not send volume
• free coingecko tier does not allow more than 365 days and intraday data is limited
• pycoingecko (library used to interact with pycoingecko) does not allow to insert paid key
• "coingecko rate limits you pretty damn quickly." -> after being rate limited user cannot load coins neither enter coin-specific menus (e.g., dd, ta)
• "Coingecko doesn't seem to be a great data provider..."
• "why did we abandon the ability to load from a variety of sources in the Crypto menu, or the --start --end? The user is limited to only the # of days that are programmed in."
• data from coingecko lags a bit behind

Solution:
introduce ccxt to allow users to load real data from crypto exchanges:

• get real data from pretty much any exchange (all the following exchanges provide OHLC data ['aax', 'ascendex', 'bequant', 'bibox', 'bigone', 'binance', 'binancecoinm', 'binanceus', 'binanceusdm', 'bit2c', 'bitbank', 'bitbay', 'bitcoincom', 'bitfinex', 'bitfinex2', 'bitflyer', 'bitforex', 'bitget', 'bithumb', 'bitmart', 'bitmex', 'bitpanda', 'bitrue', 'bitso', 'bitstamp', 'bitstamp1', 'bittrex', 'bitvavo', 'bl3p', 'btcalpha', 'btcbox', 'btcmarkets', 'btctradeua', 'btcturk', 'buda', 'bw', 'bybit', 'bytetrade', 'cdax', 'cex', 'coinbaseprime', 'coinbasepro', 'coincheck', 'coinex', 'coinfalcon', 'coinmate', 'coinone', 'coinspot', 'crex24', 'cryptocom', 'currencycom', 'delta', 'deribit', 'digifinex', 'eqonex', 'equos', 'exmo', 'flowbtc', 'ftx', 'ftxus', 'gateio', 'gemini', 'hitbtc', 'hitbtc3', 'hollaex', 'huobi', 'huobijp', 'huobipro', 'idex', 'independentreserve', 'indodax', 'itbit', 'kraken', 'kucoin', 'kucoinfutures', 'kuna', 'latoken', 'latoken1', 'lbank', 'liquid', 'luno', 'mercado', 'mexc', 'ndax', 'novadax', 'oceanex', 'okcoin', 'okex', 'okex3', 'okex5', 'paymium', 'phemex', 'poloniex', 'probit', 'qtrade', 'ripio', 'stex', 'therock', 'tidebit', 'tidex', 'timex', 'upbit', 'vcc', 'wavesexchange', 'whitebit', 'xena', 'yobit', 'zaif', 'zb', 'zipmex', 'zonda'])
• any interval - currently implemented [1- 1min, 5 - 5min, 15 - 15min, 30 - 30min, 60 - 1hr, 240 - 4hr, 1440 - 1d, 10080 - 1w, 43200 - 1M]
• similar historical data as yf provides - only limited to when exchange listed the pair (can load 1 year with 1min of timeframe - will be slow but it's possible)

disadvantages of ccxt:

• shitcoins not listed in major exchanges cannot be load (coingecko can be used for these situations)
• user needs to know the pair from the exchange (we can make a command to help on this)
• does not give an overview of the price (the price is specific to a pair in an exchange, not an overview of the market like yahoo finance or coingecko)

This PR:

• adds ccxt as source for load
• separates yf and cg as different sources for load - cg will have 0 as volume since they dont provide that anymore

[minhhoang1023]

Nice one! Loaded a couple of coins and working well.

It's better to have yf as the default, to show the price overview and not specific to any exchange. Also, the volume will be more representative when the candle command is used.

• source yf

• source ccxt

We should also include the source / exchange in the candle chart. Otherwise, when the chart is shared or is taken out of the context, volume info is wrong (if not included the exchange name).

When loading cg, wdyt about using yf for Volume as we did previously.

[jose-donato]

Nice one! Loaded a couple of coins and working well.

It's better to have yf as the default, to show the price overview and not specific to any exchange. Also, the volume will be more representative when the candle command is used.

• source yf

• source ccxt

We should also include the source / exchange in the candle chart. Otherwise, when the chart is shared or is taken out of the context, volume info is wrong (if not included the exchange name).

When loading cg, wdyt about using yf for Volume as we did previously.

yea sure I will make load from yahoo finance by default @jmaslek you won after all

About cg, i don't think mixing is good. I know I suggested that before, but I'm not a fan of that approach. I say we just ditch coingecko for messari tbh

Nevermind, i agree with you. Messari just works like ccxt so it doesnt really make sense to include it as an additional load source

[minhhoang1023]

Nice work!

Tried multiple andom shitcoins and one had this warning. Could we silence it?