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When does the Portfolio data change after buying or selling?

The portfolio information is not updated right after a buy/sell.

However, after sometime it does get updated. Trying to understand if there is some sort of check to be done before looking at the Portfolio details.
For example:
I expect to see:

2016-10-19 09:31  PRINT BUY:  
2016-10-19 09:31  PRINT Position Count: 1  

But I see:

2016-10-19 09:31  PRINT BUY:  
2016-10-19 09:31  PRINT Position Count: 0  

Just trying to understand what's going on.

Output:

2016-10-19 09:31  PRINT BUY:  
2016-10-19 09:31  PRINT Position Count: 0  
2016-10-19 09:31  PRINT Portfolio Cash: 1000.0  
2016-10-19 09:31  PRINT Portfolio Value: 1000.0  
2016-10-19 15:30  PRINT SELL:  
2016-10-19 15:30  PRINT Position Count: 1  
2016-10-19 15:30  PRINT Portfolio Cash: 411.724999963  
2016-10-19 15:30  PRINT Portfolio Value: 997.324999963  
2016-10-20 09:31  PRINT BUY:  
2016-10-20 09:31  PRINT Position Count: 0  
2016-10-20 09:31  PRINT Portfolio Cash: 996.499998897  
2016-10-20 09:31  PRINT Portfolio Value: 996.499998897  
2016-10-20 15:30  PRINT SELL:  
2016-10-20 15:30  PRINT Position Count: 1  
2016-10-20 15:30  PRINT Portfolio Cash: 412.049998831  
2016-10-20 15:30  PRINT Portfolio Value: 996.999998831  
Clone Algorithm
1
Loading...
Backtest from to with initial capital
Total Returns
--
Alpha
--
Beta
--
Sharpe
--
Sortino
--
Max Drawdown
--
Benchmark Returns
--
Volatility
--
Returns 1 Month 3 Month 6 Month 12 Month
Alpha 1 Month 3 Month 6 Month 12 Month
Beta 1 Month 3 Month 6 Month 12 Month
Sharpe 1 Month 3 Month 6 Month 12 Month
Sortino 1 Month 3 Month 6 Month 12 Month
Volatility 1 Month 3 Month 6 Month 12 Month
Max Drawdown 1 Month 3 Month 6 Month 12 Month
# Backtest ID: 581031bf248a00105f173e3e
There was a runtime error.
2 responses

An easy way to check whether the portfolio has actually been updated is in the handle_data function.

I've updated your algo as an example of how to see this portfolio data change.

handle_data runs at a minute basis, and I added a method to log when the portfolio updates

The output is:

2016-10-19 09:31  PRINT BUY:  
2016-10-19 09:32  PRINT Portfolio updated 2016-10-19 13:32:00+00:00  
Portfolio Cash now: 411.724999963  
2016-10-19 10:00  PRINT SELL:  
2016-10-19 10:01  PRINT Portfolio updated 2016-10-19 14:01:00+00:00  
Portfolio Cash now: 998.524999736  
2016-10-20 09:31  PRINT BUY:  
2016-10-20 09:32  PRINT Portfolio updated 2016-10-20 13:32:00+00:00  
Portfolio Cash now: 414.074999669  
2016-10-20 10:00  PRINT SELL:  
2016-10-20 10:01  PRINT Portfolio updated 2016-10-20 14:01:00+00:00  
Portfolio Cash now: 998.274998882  
Clone Algorithm
2
Loading...
Backtest from to with initial capital
Total Returns
--
Alpha
--
Beta
--
Sharpe
--
Sortino
--
Max Drawdown
--
Benchmark Returns
--
Volatility
--
Returns 1 Month 3 Month 6 Month 12 Month
Alpha 1 Month 3 Month 6 Month 12 Month
Beta 1 Month 3 Month 6 Month 12 Month
Sharpe 1 Month 3 Month 6 Month 12 Month
Sortino 1 Month 3 Month 6 Month 12 Month
Volatility 1 Month 3 Month 6 Month 12 Month
Max Drawdown 1 Month 3 Month 6 Month 12 Month
# Backtest ID: 5812f63cb6d2701299464996
There was a runtime error.
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Thanks @Matthew, I will give this a try.