Learning to trade on margin (please help)

You learn to trade on simulations first, margin comes last. Actually should never come into play, cuz this way , ones is giving the wheel of his life into someone else's hands.
 
Some ways I've dealt with this:

1. Rank your positions based on confidence and structure your orders based thereon. For example, if your algo says to take five positions, rank them from 1-5. Buy the first 4...

2. Set queue to liquidate. You didn't mention your broker, but in IB, you can set the order of liquidation. If you get margin called, it will sell/cover in a specified order.
https://www.interactivebrokers.com/...book/realtimeactivitymonitoring/portfolio.htm

3. Bigger margin cushion. You mentioned this in your OP. Run some tests to see what works for you; I imagine, somewhere between 5 and 10%

Hope this helps.
--Keith
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Some thing like that NIJ [Less is more]
 
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