The short answer
Protect every position, let your stops and targets do their work, hold one strategy, keep a measured tempo and give each phase enough trades to read.
The habits the DQS rewards are the habits that pass challenges, so trading for the score is trading for the target.
On every trade
Set a stop loss on every trade, and let it take the loss rather than closing by hand in haste.
Set a take profit, and let it close the trade when price reaches it.
Size each position in proportion to the account, so that no single loss is outsized.
Give trades room to travel, rather than snatching at the smallest moves.
Across the phase
Trade enough to leave a legible record. A handful of trades says little about how you work.
Spread your trading across several days rather than a single session.
Keep a measured tempo rather than a burst of trades.
Trade more than one instrument, at consistent position sizes.
Hold one strategy from start to finish.
Stay well inside your drawdown limits. A breach both lowers the score and caps how high it can go.
After a loss
Keep your size. Never raise it to win a loss back.
Keep a stop loss on the next trade.
Never add to a position that is already losing.
Between phases
Take time before opening the next phase, and change what caused the last one to end. Repeating the same failure, or starting again straight away, weighs on the score.
The habits that cost the most
Adding to a losing position
Selling repeatedly into a rising market
Holding a losing position a long way against you
Trading without stop losses
Scalping: trades that capture only the smallest moves
Discipline pays twice
The habits that lift your DQS are the same ones that keep an account inside its drawdown limits and on its way to a reward.