Shouldn't the History file be pulled based on the Symbol name, as when getting the data from the Broker?
Absolutely not! Symbols can and do have all kinds of illegal characters that are not compatible with your filesystem. (This is your broker's fault.) That's why Asset names have strict naming conventions.
Leverage: As always, a confusing topic. Are you talking about the Leverage the Broker may apply based on account size, type, whatever? Or are you talking about leveraged ETFs? If the former, and the latter is used, is then Leverage multiplied to 4x, 6x, whatever?
This was in reference to the standard (Regulation T) Margin account, where you get approximately 2:1 leverage for most stocks and ETFs. You get even more leverage for leveraged ETFs (or at least the security itself is constructed as such). You get less leverage when your broker decides to change the margin requirements for an individual symbol, as was the case with GameStop during the Diamond Hands incident. You can get even more leverage for most all products with a Portfolio Margin account, but you must have a ton of money in your account.
When in doubt, check your broker's margin requirements for any given symbol and account type.
