SPY Short, using option to accumulate down side positions

Condition:
in SPY 15 min chart, whenever uptrend line break (TLB):

Trend line break (TLB) Entry (Short):
Market buy Apr OTM Put,
Market Sell lower OTM Put, try to lock a down side range for free.

One trade this morning, use $0.2 to lock $2 range:
SPY at 250, buy P248 (market 8.06)
SPY down to 248, Sell P246 (market 7.85)

This is my personal strategy, because I have lot other long positions need to be protected.
I use OTM option, to lock $1-$2 range with small cost and low risk.
if I am wrong, when price back to uptrend line, I sell the $5 lower OTM put. (Cost about $1.5 for a $5 range)
I will adjust this spread in next trend line break.

If SPY goes up, all these down side ranges will be expired.
If SPY keeps going down, these locked ranges will cover most of my lost in long positions.
While I am locking more down side range, I could add more long positions.

This is a trading school homework. I need 6 months to practice trading plan.
If you like it, thank you for your support. Please use SIM/Demo account to try it, until my trading plans get high winning rate.

Trade active:

One trade this morning, use $0.2 to lock $2 range:
SPY at 250, buy P248 (market 8.06)
SPY down to 248, Sell P246 (market 7.85)

Trade active:

Correction, the accurate SPY price in this trade:
SPY at 250.8 (7:20 AM), buy P248 (market 8.06)
SPY down to 248.9 (7:40 AM), Sell P246 (market 7.85)

Trade closed manually:

This is a insurance for whole account. Itself is a small loss, but whole account made big profit in up trend.