Fix uncached_syms in data.py

Clean up.

Update FAQs.ipynb

Update dev version to v1.1.26

Set calc_target_shares to 0 if negative.

Move AKShare to dedicated package.

Prevents any possible import error on macOS.

Add checks for exit_price.

Check that stop is set when exit_price is set.

Check that stop fill price is within the bar's low-high range.

Check stops before placing scheduled orders.

Update README.md