Investments can be made simplest by creating an user’s portfolio. You ought to be investing only in your user’s portfolio.
That means whatever you use is worth investing for. Like whatever successfully drives your buy decision that regularly is worth investing substantially in its stocks as well.
Buying and selling the stocks may have another simplest rules. You may buy only around a 52 weeks low price within your user’s portfolio to be selling only around a 52 weeks high price.