Are there manipulated platforms?

For several days now, I have placed orders not on Binance, but I would like to know if anyone has experienced this or even thought about it, or the opinion of those who are traders to tell me if it's just speculation. I have been keeping an eye on several tokens at the time of their release, and I find it curious how I have an order (for example) at a certain price, and the market does not reach that price; however, when I modify it and step away from there, the price rises (in case of selling) or falls after I have bought. And I ask myself, can this happen on some platforms? Could it be like a casino where the house always wins? Or are these just beliefs based on my ignorance...

I would like to know your experience regarding this, thank you!!

#Traiding