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CoinGeckUniverse returns one symbol

Hello,

I am trying to use CoinGeckoUniverse for the first time. When I use sample code from documentation, debug messages shows Gecko universe inport only one symbol : DAPP

Update Backtest

person upvoted this people upvoted this

Mislav Sagovac

| |

Accepted Answer

Update Backtest

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Mia Alissi

STAFF Pro ,

class CryptoMarketCapUniverseAlgorithm(QCAlgorithm):
    def initialize(self) -> None:
        self.set_start_date(2020, 1, 1)
        self.set_account_currency("USD") 
        self._market = Market.COINBASE
        self._market_pairs = [
            x.key.symbol 
            for x in self.symbol_properties_database.get_symbol_properties_list(self._market) 
            if x.value.QUOTE_CURRENCY == self.account_currency
        ]
        self._universe = self.add_universe(CoinGeckoUniverse, self._select_assets)
    def _select_assets(self, data: List[CoinGecko]) -> List[Symbol]:
        for datum in data:
            self.debug(f'{datum.coin},{datum.market_cap},{datum.price}')
        tradable_coins = [d for d in data if d.coin + self.account_currency in self._market_pairs]
        return [
            c.create_symbol(self._market, self.account_currency) 
            for c in sorted(tradable_coins, key=lambda x: x.market_cap)[-10:]
        ]

Sources: Crypto - QuantConnect.com, Crypto Market Cap - QuantConnect.com, January Effect In Stocks, Coarse Fine Universe Selection Benchmark, Manual Universes - QuantConnect.com

Mislav Sagovac

29.1k Pro ,

This still returns an error

'NoneType' object is not iterable at _rebalance symbols = [symbol for symbol in self._universe.selected if self.securities[symbol].price] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ in main.py: line 34

Louis Szeto

STAFF Pro ,

Hi Mislav

It seems like self._universe has not started its selection yet, so you may add an if-condition:

if self._universe.selected:
    symbols = [symbol for symbol in self._universe.selected if self.securities[symbol].price]

Best
Louis

Mislav Sagovac

29.1k Pro ,

Hi Louis Szeto ,

I have try to add your code to on_data, but it doesn't print any symbol in the console. Here are debug messages:

1045