async convertCurrencyToAsset(exchangeName, symbol, currencyAmount) {
    const ticker = this.tickers.get(exchangeName, symbol);
    if (!ticker || !ticker.bid) {
      this.logger.error(
        `Invalid ticker for calculate currency capital:${JSON.stringify([exchangeName, symbol, currencyAmount])}`
      );
      return undefined;
    }

    return currencyAmount / ticker.bid;
  }
If you want to trade with 0.25 BTC this calculated the asset amount which are available to buy

@param exchangeName
@param symbol
@param currencyAmount
@returns {Promise<number>}