Crypto GDAX algo keeps buying more than Self.SetHoldings Asks

Hi Apollos Hill,
The issue with invalid orders is related to using SetHoldings to place orders. This method works well with all security types but not with multiple cryptocurrencies (it works well with just one). This is because crypto-currency securities represent a virtual position. For more details, please check out the following community thread:
"BTCUSD" - What are Virtual Positions? #3178
We suggest you take a look at the BasicTemplateCryptoAlgorithm since it's an excellent example of how orders should be created in this case.
Best,
Varad Kabade

HI VArad, 

Thanks for shedding light on the current issue . I figured i was behind on the existing issues again. I am looking at this template and its great for planning orders on specific coins but i need a model for placing orders on a list of varied coins.  Do you have any suggestions? I started implementing the marketorder function using the quantity code provided in this template Its still trying to buy 250 ETH which is way more than i can afford.
 

limitPrice = round(self.Securities[symbol].Price * 0.999, 2)

               quantity = usdTotal * 0.05 / limitPrice

               if sym_price >= top::
                   self.MarketOrder(symbol, quantity)

I just realized that for some of these cross pairs like ETHBTC. i'm not using USD to purchase them so having usdTotal as my quantity basis is invalid. i need to use the base currency, so if buying ETHBTC, i need to use the total BTC quantity i have.  Any suggestings on coding this for 12 pairs without writing a thousand lines of code ? :-P i'm not a developer but i'm learning…

edit: I don't see any cross pairs in this template. Searching for an exampe in the github now. 

Hi  Apollos Hill,
To buy ETHBTC, we would need to get the amount of BTC from the portfolio, and the Same goes for trading with other pairs. Refer to the following code snippet for reference.

btc = self.Portfolio.CashBook["BTC"].Amount
quantity = btc * 0.5 / self.Securities["ETHBTC"].Price

Best,
Varad Kabade