Yes, the 200day is an important MA for many reasons as stated above. However, if you use a weekly and adjust the input to make it a 200 day, it will be slightly different. Likewise, the exponential and the simple differ slightly also, about the same amount of "slack".
As a matter of practicality, I would put the daily 200 day at a dotted or dashed line, and keep the weekly as solid lines, for ease of viewing.
Or I would put in the 200day bars in the chart, but as hidden, and then a visible 200 day overlaying the weekly bars.
Lastly, consider not only the 200MA slope, but also delta between the price and the MA. It is easy to create an indicator for that.
Hope that helps
As a matter of practicality, I would put the daily 200 day at a dotted or dashed line, and keep the weekly as solid lines, for ease of viewing.
Or I would put in the 200day bars in the chart, but as hidden, and then a visible 200 day overlaying the weekly bars.
Lastly, consider not only the 200MA slope, but also delta between the price and the MA. It is easy to create an indicator for that.
Hope that helps