To all here I would add that
If I want to place a trade that sets the market I am very precisely questioned and left in no doubt that for me to instruct to proceed that the repercussions will come back on me.
Ie if the VWA for the days trading is close to 5 and i instruct to sell a small amount at 4 to complete an order; or for any other reason, I will be strongly questioned.
Sincerely
Viney