RP&L Daily Trailing Stop

This would be an auto trail on gains during a trading session which would be activated when reaching a "Trigger" amount in gains. Once "triggered" it activates a Max Loss Trailing Drawdown (MLTD) from the set trigger amount I have put in play. From there it would trail to only allow a set loss from each new high water mark I manage.
Example: I set a trigger at $800 with a MLTD amount from the trigger I set that, if hit, will end the day if I draw down from that high water mark to the limit of loss I set. Using $300 as my max loss from the high water mark, once I reach $800 I have now secured at least a $500 win for the day. I wont be allowed to give back all the gains. Further along in the example, say I run it from $800 to $1200. The max drawdown of $300 that follows it once activated now has my MLTD from gains at a kill switch of $900.
An potential added feature would be to have a checkmark allowing the option of having it use either Unrealized Profits during a trade (i.e. a Live drawdown setting) or Realized Profits once the trade is closed, akin to the EOD drawdown (but in this case EOT-End of Trade.