Short answer is some combination of (1) That requires work and then they would have to explain to people and (2) People aren't asking for it. If you want to ro

Short answer is some combination of (1) That requires work and then they would have to explain to people and (2) People aren't asking for it. If you want to roll your own, you can use free data from Yahoo and FRED and get there pretty quick. You should also consider tax implications. For example, trading equities short-term is awful and PL taxed at income rate. Compare that to buying real estate which has a 101 ways to avoid paying taxes.