Abstract: A tool for use by financial professionals such as portfolio managers monitors values of assets in portfolios and maintains buy and sell levels for the assets. The tool can be configured to recommend the sale of an asset where the asset value has increased in a gain run by at least the corresponding sell level and the value of the asset in the portfolio is more than a target allocation. The tool can be configured to recommend the purchase of an asset where the asset value has decreased in a drop run by at least the corresponding buy level and the value of the asset in the portfolio is less than a target allocation. The tool may monitor a balance in a non-volatile account and coordinate the transfer of funds from sales of assets into the non-volatile account. Machine implemented methods can assist management of financial portfolios.