A word on price data in anticipation of the coming section on trading methods.
Any output is only as 'complete' as its input. Within any given timeframe, be it yearly, monthly, weekly, daily, hourly, minutely, secondly, tickly, you are presented with four basic aspects of price data: Open, High, Low, Close (OHLC). Volume (V) is also a related matter, but for the moment we are focussing on the ball which is price.
Now, if you have looked at my earlier posts about 3d charts you will begin to realise that high and low prices are relatively more pertinent than the open and close prices. I know it's obvious but the open and close prices are simply where price bars begin-end-begin-end-begin-end and so on. In a large non-stop market with sound data collection they should be around the same position as each other when one bar ends and another one begins. You can therefore think of the open-close relationship then as simply a 'connector' from one time-bar to another. I am not saying they do not have value, but simply that they are secondary to the primary status of high and low prices.
In any given timeframe, the high and low prices show the full range of the spiral orbits, as best you can, that is, in 2d. To therefore construct a complete picture of how the market is moving, it is very prudent to include the high and low prices in your price data. I will explain further why this is so when we come to trading methods.
Whenever you therefore study a chart, make sure it is first properly framed. Include the high and low prices by using bars or candlesticks, rather than just showing the close prices on a line graph.
Another aspect to consider is to show charts which cover a wide price range in a logarithmic format on the y-axis. Price movement is a natural event and so in 2d moves geometrically and not in a linear fashion. The logarithmic format helps to show price movement in more 'real' terms, relatively speaking.
Will post again soon ...