IMO, STOP orders often get "bad" fills because the price you pick is often a support or resistance point and there can be a large number of short term traders do the same. The Market Makers, often the only liquidity, pull their bids when there is a large supply, until it settles. No one is hunting you. Would you post large bids if you see 5000 market orders hitting you all at once? Not 5000 shares, but 5000 orders. Or, would you scale down?
Occam's Razor for the logic that would be lost on most. On a technical level we're talking specialized infrastructure and software beyond level 2 data available to retail, yes?
Let me rephrase for clarity. MM’s have access to specialized infrastructure, data and software not available to retail, correct? This is distinct from the concept of MM’s not participating when market conditions are not favorable to their profitability, yes?
you think captchas can track what you're doing on your local computer? they somehow login? are captchas a virus?
ymmv, there was a tedtalk somewhere that essentially said the same - done by someone with better credentials.