Gekko works great but I have some questions

[rubinho]

What can I say but wow?  This platform is great.  I've got it up and running, written a strat using multiple indicators, backtested it and run it live (with pennies) and it all goes like clockwork.  Impressive! 

A few things I am not sure on which I may have missed in the documentation. 

1. What's the difference between check and update?  They both seem to do the same thing. 
   
2. Do check/update get called at each quote from the exchange or just on a candlestick close?
   
3. How do you trade at market rather than just candlestick close?
   
4. When trading live, how do you get your exchange account balances and set the order quantity?  The advice long/short only seems to trade a single unit of the base currency. 
   
5. When using indicators, is it possible to get them to plot on the backtest graph so you can check your buy/sell triggers are doing the correct thing?
   

Many thanks!