There's nothing wrong with it, as long as you're influencing prices only with your own funds, not conspiring with others or trading on information which you're

There's nothing wrong with it, as long as you're influencing prices only with your own funds, not conspiring with others or trading on information which you're not supposed to trade on. On smaller exchanges with less liquidity you see it all the time. If average trading volume is 20k shares, buy 50k and you will move the price. Then sell in small blocks, maybe through multiple brokers...