Invalid Orders being thrown

[bl3e967]

A bunch of orders are invalid with error code -7 (Rejected by broker).
This is most likely because the algorithm is buying assets without consideration of remaining cash.

Change from using MarketOrder method to SetHoldings method (example):
self.SetHoldings([PortfolioTarget("SPY", 0.8), PortfolioTarget("IBM", 0.2)])

[bl3e967]

This happens because we are placing orders every time the price change exceeds the MI threshold. This is not optimal, and causes our exposure to grow without bounds until we hit the margin call.