@Emiliano,

Add this to a cell:

import qgrid  
# Set the default max number of rows to 12  so theDataFrame we render  
# with qgrid isn't too tall.  
qgrid.set_grid_option('maxVisibleRows', 12)

# Render DataFrame with QGrid  
qgrid.show_grid(df)

# Uncomment and run this line to allow columns to overflow the cell window  
# and show a toolbar to add/remove rows and view in fullscreen  
# qgrid.show_grid(df, grid_options={'forceFitColumns': False}, show_toolbar=True)  

This and more were found at:
https://www.quantopian.com/docs/recipes/research-recipes#qgrid-example

On the content side, trying to parse these papers/indexes for some insights...perhaps make some factors based on their results.

https://sites.hks.harvard.edu/fs/rzeckhau/InsiderTrading.pdf
https://poloclub.github.io/polochau/papers/13-snam-insider.pdf
http://www.zacksdata.com/data/insider-transactions/zacks-insider-rank/

alan

thank you very much @Alan

For what concerns possible sources of ideas/alpha for the tearsheet challenge I will add this one, too:
The 7 Lessons Of Insider Transactions

Here's an updated version of my notebook:

Next thing to do:
Trying to make the final alpha factor be influenced more by stocks that have an higher number of unique filers:

If stock A has 1 total buyer and 0 total sellers during the last 90 days shouldn't have an alpha factor score as high as another stock that had 100 unique buyers and 0 or 1 or 2 .... unique sellers

In this notebook I try to address this problem:

Blockquote If stock A has 1 total buyer and 0 total sellers during the last 90 days shouldn't have an alpha factor score as high as another stock that had 100 unique buyers and 0 or 1 or 2 .... unique sellers

Testing the new alpha factor

The original one was better :(

Trying slices of 30 days

Next idea to test:

Trying to create alpha factor according to the trend in the last 90, 30 trading and 7 trading days:

Here I try to create alpha factor according to the trend in the last 90, 30 trading and 7 trading days:

Trying to use the research environment to test my alpha factors

Added winsorize() and zscore()

What do you think I miss? Any suggestions? Should I try to trade more frequently or less according to this IC decay graph?