The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.NEW YORK ( fxtechstrategy.com) -- The dollar-Swiss franc currency pair (USD-CHF) closed lower for a third week in a row on Friday, opening the door for more declines in the new week. The dollar-Swiss franc currency pair broke through 0.8706, its Sept. 20 low, and 0.8647, its Sept. 15 low, to turn further bear pressure toward 0.8537, its Sept. 7 low. A violation of the latter level will allow for more declines toward the 0.8400 psychological level and possibly toward the 0.8300 psychological level. > > Bull or Bear? Vote in Our Poll The USD-CHF's weekly relative strength index (RSI) is bearish and pointing lower, suggesting further weakness. Alternatively, on any recovery higher, the 0.8706 level will come in as the initial resistance, followed by 0.8879, the pair's Oct. 17 low. Further out, resistance stands at the 0.9081 level, the dollar-Swiss franc's Oct. 20 high, and ultimately, 1.9316, the October high. All in all, the pair remains vulnerable to the downside on further downside weakness.