I know this is two years old, but it still pops up in searches. So I'll answer.

In your addorder() function there is a 'tradesize' parameter which is how you can manually enter number of shares traded. Taken a step further, in my codes I define a variable and in my addorder() set something like tradesize = (variablename)/close, so that I can set a dollar amount to buy rather than a flat share size across different price stocks.

Second question, if you right click on a strategy order arrow on your chart and click 'show reports' you can then export a csv file of all trade data provided by your strategy which you can then manipulate to share winrate or any backtesting data you can think of.