To use this module, you need to:

1.  Go to System Parameters and configure the
    `sale_order_line_price_history.order_line_limit` parameter to limit
    the number of Sale Order Lines to show on the Wizard.
2.  Go to *Sales -\> Quotations* and select a Quotation. Default is 20
    lines.
3.  Click on the new clock button in one of the sale order lines.
4.  A pop-up will open and you will see the *price history* for the
    product of the sale order line and for the customer of the sale
    order.
5.  You can select other customer or leave it empty to see the price
    history for all customers.
6.  You can also set the price of one of the price history lines in the
    sale order line. To do that, you have to open the price history line
    desired and click the smart button named *Set price*.
