Money left on a market is money exposed to whatever happens to the market. After an order settles, withdraw what you are not about to spend to a wallet you control.
Keep the on-market balance sized to the order in front of you rather than a stack of unspent coin. Withdraw Monero to Feather or Cake, or Bitcoin to Sparrow or Electrum. The point of holding your own keys is that the coin is yours regardless of what happens to any market.
That completes the flow. From here, ordering again is just steps two through six.