private AsOfWrapper<decimal?> DetermineCossValue(CachePolicy cachePolicy)
{
    OrderBook binanceEthBtcOrderBook = null;
    (decimal? UsdValue, DateTime? AsOfUtc) btcUsdValue = ((decimal?)null, (DateTime?)null);

    var binanceTask = LongRunningTask.Run(() =>
    {
        binanceEthBtcOrderBook = _exchangeClient.GetOrderBook(IntegrationNameRes.Binance, "ETH", "BTC", cachePolicy);
    });

    var cryptoCompareTask = LongRunningTask.Run(() =>
    {
        btcUsdValue = _cryptoCompareClient.GetUsdValueV2("BTC", cachePolicy);
    });

    var cossCossEthOrderBook = _exchangeClient.GetOrderBook(IntegrationNameRes.Coss, "COSS", "ETH", cachePolicy);
    var cossCossBtcOrderBook = _exchangeClient.GetOrderBook(IntegrationNameRes.Coss, "COSS", "BTC", cachePolicy);

    binanceTask.Wait();
    cryptoCompareTask.Wait();

    var binanceEthBtcBestAskPrice = binanceEthBtcOrderBook.BestAsk().Price;
    var binanceEthBtcBestBidPrice = binanceEthBtcOrderBook.BestBid().Price;

    var ethBtcRatio = new List<decimal> { binanceEthBtcBestAskPrice, binanceEthBtcBestBidPrice }.Average();

    decimal totalWeight = 0;
    decimal totalTop = 0;

    const decimal MinimumImportantQuantity = 1.0m;

    var btcAsks = cossCossBtcOrderBook.Asks.Where(item => item.Quantity >= MinimumImportantQuantity).OrderBy(item => item.Price).Take(3).ToList();
    for (var i = 0; i < btcAsks.Count; i++)
    {
        var order = btcAsks[i];
        var quantitySqrt = (decimal)Math.Sqrt((double)order.Quantity);
        var weight = quantitySqrt / ((i + 1) * (i + 1));

        totalTop += order.Price * weight;
        totalWeight += weight;
    }

    var btcBids = cossCossBtcOrderBook.Bids.Where(item => item.Quantity >= MinimumImportantQuantity).OrderByDescending(item => item.Price).Take(3).ToList();
    for (var i = 0; i < btcBids.Count; i++)
    {
        var order = btcBids[i];
        var quantitySqrt = (decimal)Math.Sqrt((double)order.Quantity);
        var weight = quantitySqrt / ((i + 1) * (i + 1));

        totalTop += order.Price * weight;
        totalWeight += weight;
    }

    var ethAsks = cossCossEthOrderBook.Asks.Where(item => item.Quantity >= MinimumImportantQuantity).OrderBy(item => item.Price).Take(3).ToList();
    for (var i = 0; i < ethAsks.Count; i++)
    {
        var order = ethAsks[i];
        var quantitySqrt = (decimal)Math.Sqrt((double)order.Quantity);
        var weight = quantitySqrt / ((i + 1) * (i + 1));

        totalTop += order.Price * weight * ethBtcRatio;
        totalWeight += weight;
    }

    var ethBids = cossCossEthOrderBook.Bids.Where(item => item.Quantity >= MinimumImportantQuantity).OrderByDescending(item => item.Price).Take(3).ToList();
    for (var i = 0; i < ethBids.Count; i++)
    {
        var order = ethBids[i];
        var quantitySqrt = (decimal)Math.Sqrt((double)order.Quantity);
        var weight = quantitySqrt / ((i + 1) * (i + 1));

        totalTop += order.Price * weight * ethBtcRatio;
        totalWeight += weight;
    }

    var cossBtcValuation = totalTop / totalWeight;
    var cossUsdValuation = cossBtcValuation * btcUsdValue.UsdValue.Value;

    var lastDate = new List<DateTime>
    {
        cossCossEthOrderBook.AsOf.Value,
        cossCossBtcOrderBook.AsOf.Value,
        btcUsdValue.AsOfUtc.Value,
        binanceEthBtcOrderBook.AsOf.Value
    }
    .OrderBy(item => item)
    .First();

    return new AsOfWrapper<decimal?> { Data = cossUsdValuation, AsOfUtc = lastDate };
}