If the price goes up, it will probably keep going up. If the price goes down, it will probably keep going down. That is all you have. Certainty? None. The stop is required.
Now I want to look at a 20 year chart of your height/weight ratio to predict if you'll make it 20 years. If you do I'll react if I'm still here. Hope you traded well and retired comfortably.
it certainly depends on whether the company is producer or consumer of oil products. it is not worth to produce lots of oil if you make little or no profit from selling it. on the other side, if one company buys oil products to further process it to make chemicals or so, then lower oil prices will lead to more profit. how one index will be impacted depends on how the underlyings are impacted, for example the netherlands stock market index is positively correlated to oil prices in general.
Price matters in day trading. But Volume impacts movement more. But here's the thing if alot of traders say ok, if we get above the 8 and 12 and 50 moving average for like 3 days, I taking some off the table. That moves price. So if the trades people make based on "Whatever" plan or algo they use. And the Algo works until it doesn't. One trade I know trades nothing but /NQ futures and follows the price movement within a defined 2 minuter range. It works for him and those who follow his strategy. So Price works.
Not oil companies. Stable prices are most important. If a airline edges and for rise in oil prices and prices go down then they are stuck with edge or they unwind it. The unwind process could drive the price backup. But there are 100s of different grades or oil and they all have differing price. Demand drives the price of oil right now not supply because there is an over supply.