I don´t know TD and FXView, but short list in Interactive Brokers is awful. Very difficult to find the hot small caps everyday make pumps.
"Hot small caps every day make pumps" - who is going to have those available and even if so, who is going to lend them out? By their nature they will be hard to borrow and risky for a firm to lend out - think short squeeze and potential large losses that a broker needs to accept (or try to collect) in return to lending you the shares.